华师19春《阅读理解与技巧》在线作业
华师《阅读理解与技巧》在线作业1.[单选题]My classmate____________a lot of good deeds for others.
华师作业答案可以联系QQ 761296021
A.has been done
B.did
C.was doing
D.had done
正确答案:——B——
2.[单选题]It is a problem that doesn't need____________right now.
A.to solve
B.solving
C.being solved
D.to be solving
正确答案:——A——
3.[单选题]I am sorry____________ written you a letter at the time.
A.to have not
B.to not have
C.not to have
D.not having
正确答案:——C——
4.[单选题]There's a man at the reception desk who seems very angry and I think he means____________trouble.
A.making
B.to make
C.to have made
D.having made
正确答案:————
5.[单选题]Jack____________ in the street when I____________on him.
A.walked...called
B.was walking ...was calling
C.walked ... was calling
D.was walking ...called
正确答案:————
6.[单选题]I'm going to Xi'an next week. Have you anything ____________to your parents?
A.to take
B.to be taken
C.to be bought to
D.to buy
正确答案:————
7.[单选题]A party is the____________ activity I want to take part in.
A.just
B.good
C.most
D.very
正确答案:————
8.[单选题]We all believe that computer____________ smaller and smaller in the coming years.
A.can be become
B.will be got
C.will be changed
D.can turn
正确答案:————
9.[单选题]David ____________himself while he ____________the machine.
A.hurted... was fixing
B.hurts... is fixing
C.hurt ...fixed
D.hurt ... was fixing
正确答案:————
10.[单选题]"I'm sorry to have kept you waiting."
"Oh, not at all. I ____________here only a few minutes."
A.have been
B.had been
C.was
D.will
正确答案:————
11.[单选题]If you study hard, you____________the examination.
A.has passed
B.are passing
C.have passed
D.will pass
正确答案:————
12.[单选题]You should go to the grand opening ceremony, ____________ ?
A.aren't you
B.shouldn't you
C.wouldn't you
D.don't you
正确答案:————
13.[单选题]In such dry weather, the flowers will have to be watered if they____________.
A.have survived
B.are to survive
C.would survived
D.will survive
正确答案:————
14.[单选题]You aren't using this typewriter, ____________ ?
A.are you
B.do you
C.will you
D.have you
正确答案:————
15.[单选题]Mark often attempts to escape ____________ whenever he breaks traffic regulations.
A.having been fined
B.to have been fined
C.to be fined
D.being fined
正确答案:————
16.[单选题]Kate said that ____________.
A.she had finished writing the composition the night before
B.she had finished writing the composition last day
C.I finished writing the composition on the last night
D.she finished writing the composition before the night
正确答案:————
17.[单选题]Today's weather isn't as cold as it was yesterday,____________ ?
A.was it
B.wasn't it
C.is it
D.isn't it
正确答案:————
18.[单选题]Everything seems all right, ____________ ?
A.doesn't it
B.won't it
C.hasn't it
D.don't they
正确答案:————
19.[单选题]I remember____________him____________the bike needed____________.
A.hearing ... saying ... to repair
B.to hear ... say ... to repair
C.hearing ... say ... repairing
D.to hear ... saying ... to be repaired
正确答案:————
20.[单选题]"Did you enjoy last night's concert?""Yes. Though the last piece____________rather poorly. "
A.was played
B.played
C.was playing
D.playing
正确答案:————
21.[单选题]The sun is____________ , far away from the earth.
A.much
B.very
C.far
D.so
正确答案:————
22.[单选题]By the end of 2020 China ____________much stronger and richer.
A.will become
B.would become
C.is becoming
D.will have become
正确答案:————
23.[单选题]My wife said in her letter that she would appreciate ____________ from you sometime.
A.to have heard
B.to hear
C.for hearing
D.hearing
正确答案:————
24.[单选题]His three children ____________ now college graduates, he felt he could retire from business.
A.to be
B.being
C.having been
D.been
正确答案:————
25.[单选题]Robert is said to____________abroad, but I don't know what country he studied in.
A.to have studied
B.to study
C.to be studying
D.to have been studying
正确答案:————
26.[] Turtles are reptiles that live within a bony shell. There are many types. Some of the 200 to 300 kinds in the world live only in water -- some others live only on land. Still other species can live in both environments. Tortoises and terrapins are names for certain turtles. The name tortoise is commonly applied to land turtles, while the term terrapin generally refers to any turtle that is served to people as food. The shell that surrounds a turtle's body is formed from its backbone and ribs growing together under a covering of thick, plate like scales. The top part of the shell curves over the turtle's back, whereas the underside is a flat surface. When a turtle is frightened, it pulls its legs, tail, and head inside its shell. Then it hides there. When the danger is over, the turtle emerges and continues in its way. Turtles have been in existence for at least 155 million years. Many centuries ago some of them were much longer. They measured up to twelve feet! The turtles found today are much smaller, although one species, the Galapagos turtle, sometimes weighs as much as 500 pounds. Turtles have many interesting characteristics. Like many cold-blooded animals, for example, they hibernate during the winter. Most species have been eyesight but poor hearing. However, turtles can sense vibrations carried through the air or water to their skins. They do not have teeth. Instead, they have horny beaks so powerful that some species can bite off a person's finger with a single, swift chop. To produce their young, female turtles dig a hole in soft sand or dirt with their hind legs. Then they lay their eggs there. After that they cover them and go away, leaving the warmth of the sun to hatch the babies. As soon as they hatch, the newborn turtles crawl toward the water, where they find protection until their soft shells have a chance to harden.
(1)Which of the following states the main idea of the passage?
A.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">Turtles are clever animals.</font></span>
B. <font size="2">Turtles' shells are important to them.</font>
C.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">To know about turtles.</font></span>
D.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">To make friends with turtles.</font></span>
正确答案:————
(2)Generally speaking, turtles ______.
A.<font size="2">are divided into only tortoises and terrapins</font><br /><br />
B.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">could all live in water, and some even could live on the land</font></span>
C.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">are classified into about 300 kinds</font></span>
D.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">could make delicious food depending on what type it belongs to.</font></span>
正确答案:————
(3)What might the word "chop"(para.3) probably mean?
A.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">a quick short cutting blow</font></span>
B.<font size="2"> a heavy forceful striking</font>
C.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">biting</font></span>
D.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">squeezing</font></span>
正确答案:————
(4)Which of the following statement is NOT true according to the passage?
A.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">Turtles had been seen millions years ago.</font></span>
B.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">Turtles today don't have the large size as they used to.</font></span>
C.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">The species will decide to what size a turtle can grow.</font></span>
D.<font size="2">Turtle are cold-blooded animals for they hibernate in winter.</font><br /><br />
正确答案:————
(5) What might be the author's attitude toward turtles?
A.<font size="2">We can't judge from the passage.<br /></font><br />
B.<font size="2"> He tends to like them very much.</font>
C.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">He doesn't like them very much.</font></span>
D.<font size="2"> He is asking us to protect them.</font>
正确答案:————27.[]To understand the marketing concept, it is only necessary to understand the difference between marketing and selling. Not too many years ago, most industries concentrated primarily on the efficient production of goods, and then relied on “persuasive salesmanship” to move as much of these goods as possible. Such production and selling focuses on the needs of the seller to produce goods and then convert them into money.Marketing, on the other hand, focuses on the wants of consumers. It begins with first analyzing the preferences and demands of consumers and then producing goods that will satisfy them. This eye-on-the-consumer approach is known as the marketing concept, which simply means that instead of trying to sell whatever is easiest to produce or buy for resale, the makers and dealers first endeavor to find out what the consumer wants to buy and then go about making it available for purchase.This concept does not imply that business is benevolent or that consumer satisfaction is given priority over profit in a company. There are always two sides to every business transaction ––– the firm and the customer ––– and each must be satisfied before trade occurs. Successful merchants and producers, however, recognize that the surest route to profit is through understanding and catering to customers. A striking example of the importance of catering to the consumer presented itself in mid-1985, when Coca Cola changed the flavor of its drink. The non-acceptance of the new flavor by a significant portion of the public brought about a prompt restoration of the Classic Coke, which was then marketed alongside the new. King Customer ruled!
(1) The marketing concept discussed in the passage is, in essence, ______.
A.<div>the practice of turning goods into money</div> 无忧答案网
B.<div><font size="2">making goods available for purchase</font></div>
C.<div>the customer-centred approach</div>
D.<div>a form of persuasive salesmanship</div>
正确答案:————
(2) What was the main concern of industrialists before the marketing concept was widely accepted?
A.<font size="2">The needs of the market.</font><span> </span>
B.<div>The efficiency of production</div>
C.<span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">The satisfaction of the user.</font> </span>
D.<div>The preferences of the dealer.</div>
正确答案:————
(3)According to the passage, “to move as much of these goods as possible” (Lines 3-4, Para.1) means “______”.
A.<div> to sell the largest possible amount of goods</div>
B.<div>to transport goods as efficiently as possible</div>
C.<div>to dispose of these goods in large quantities</div>
D.<div> to redesign these goods for large-scale production</div>
正确答案:————
(4)What does the restoration of the Classic Coke best illustrate?
A.<div> Traditional goods have a stronger appeal to the majority of people.</div>
B.<div>It takes time for a new product to be accepted by the public.</div>
C.<div> Consumers with conservative tastes are often difficult to please.</div>
D.<span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">Products must be designed to suit the taste of the consumer.</font></span>
正确答案:————
(5) In discussing the marketing concept, the author focuses on ______.
A. its main characteristic
B.<div>its social impact</div>
C.<span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">its possible consequence</font></span>
D.<div>its theoretical basis</div>
正确答案:————28.[]Eclipse is a word meaning "hide." When the moon passes in front of the sun, the sun is hidden from us, and we call that an eclipse of the sun. When the moon becomes hidden in the earth's shadow, we call that an eclipse of the moon. An eclipse of the sun happens in daytime when the moon is "new" and on the same side of the earth is the sun. Even though the moon is much smaller than the sun, the moon is closer to earth, so it can completely block off the sun. This is called a total eclipse. People in certain areas on earth see a black disc in the sky. It has a beautiful halo of light around it. When the moon is not directly between the sun and the earth, it darkens only part of the sun, causing a partial eclipse. An eclipse of the moon happens at night when the moon is full. The earth has a shadow, just like everything else the sun shines on. This shadow stretches out into space on the side of the earth away from the sun. If the moon moves completely into this shadow, the eclipse is total. Then people on earth see something very strange. The whole moon turns deep red. A partial eclipse will happen if the moon moves only partly into the earth's shadow.Long ago people were afraid of eclipses. They didn't like the strange darkness caused by them. They thought it was caused by a dragon trying to eat up the sun. These people shot arrows into the air and beat drums. In this way they hoped to scare away this beast. Other people would urge dogs to howl in order to frighten away bad spirits. Eclipses, however, have really been quite helpful. Much has been learned from them. During one in 1868 scientists discovered helium, the gas that makes balloons rise. Another eclipse allowed scientists to record the very hot temperatures of the outer parts of the sun. Also, the belief that the sun's pull caused light from other passing stars to turn rather than go in a straight line was proved during an eclipse. The world continues to learn exciting facts from eclipses.
(1)What might be the possible title for the passage?
A.<font size="2">Why the Sun Disappears.</font><br /><br />
B. When the Sun Is Blocked.
C. Eclipse.<br /><br />
D.Shading.<br /><br />
正确答案:————
(2)An eclipse of the sun takes place when ______.
A.the moon is just covering it<br /><br />
B.the moon is nearer to the earth<br /><br />
C. the moon is directly between the sun and the earth<br /><br />
D. the moon is appearing in its full shape<br /><br />
正确答案:————
(3)An eclipse of the moon takes place when ______.
A. the whole moon turns deep red<br /><br />
B. the moon moves completely into the earth's shadow
C. the earth has a shadow<br /><br />
D.the sun stands between the moon and the earth<br /><br />
正确答案:————
(4)What attitude did human use to have toward eclipse?
A.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 9.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 9.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">They were greatly frightened.</font> </span></span>
B. They felt extremely surprised.<br /><br />
C. They appeared to be pleased.
D.They tended to be doubtful.<br /><br />
正确答案:————
(5)Where might this article be taken from?
A.<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 9.0pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><font face="Arial" size="2">A scientific report.</font> </span>
B. A book of popular science.<br /><br />
C. A magazine of the outer space. <br /><br />
D. An evening newspaper.<br /><br />
正确答案:————29.[]In the world of entertainment, TV talk shows have undoubtedly flooded every inch of space on daytime television. And anyone who watches them regularly knows that each one varies in style and format. But no two shows are more profoundly opposite in content, while at the same time standing out above the rest, than the Jerry Springer and the Oprah Winfrey shows. Jerry Springer could easily be considered the king of “trash talk. The topics on his show are as shocking as shocking can be. For example, the show takes the ever-common talk show themes of love, sex, cheating, guilt, hate, conflict and morality to a different level. Clearly, the Jerry Springer show is a display and exploitation of society’s moral catastrophes, yet people are willing to eat up the intriguing predicaments of other people’s lives. Like Jerry Springer, Oprah Winfrey takes TV talk show to its extreme, but Oprah goes in the opposite direction. The show focuses on the improvement of society and an individual’s quality of life. Topics range from teaching your children responsibility, managing your work week, to getting to know your neighbor. Compared to Oprah, the Jerry Springer show looks like poisonous waste being dumped on society. Jerry ends every show with a “final word”. He makes a small speech that sums up the wntire moral of the show. Hopefully, this is the part where most people will learn something very valuable. Clean ad it is, the Oprah show is not for everyone. The show’s main target audience are middle-class Americans. Most of these people have the time, money, and stability to deal with life’s tougher problems. Jerry Springer, on the other hand, has more of an association with the young adults of society. These are 18- to 21-year-olds whose main troubles in life involve love, relationship, sex, money and peers. They are the ones who see some value and lessons to be learned underneath the show’s exploitation. While the two shows are as different as night and day, both have ruled the talk show circuit for many years now. Each one caters to a different audience while both have a strong following from large groups of fans. Ironically, both could also be considered pioneers in the talk show world.
(1)Compared with other TV talk shows, both the Jerry Springer and the Oprah Winfrey are ______.
A.more family-oriented
B.<div>unusually popular</div>
C.more profound<span> </span>
D.<div>relatively formal</div>
正确答案:————
(2)Though the social problems Jerry Springer talks about appear distasteful, the audience ??______.
A.<span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US"><font size="2" face="Arial">remain fascinated by them</font> </span>
B. <span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US"><font size="2" face="Arial">are ready to face up to them</font> </span>
C.remain indifferent to them
D.<span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US"><font size="2" face="Arial">are willing to get involved in them</font></span>
正确答案:————
(3)Which of the following is likely to be a topic of the Oprah Winfrey show?
A.A new type of robot.<span> </span>
B.<div>Racist hatred.</div>
C.Family budget planning.<span></span>
D.<div>Street Violence.</div>
正确答案:————
(4)Despite their different approaches, the two talk shows are both ______.
A.ironical<span> </span>
B.sensitive
C.instructive<span> </span>
D.cynical
正确答案:————
(5)We can learn from the passage that the two talk shows ______.
A.<span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US"><font size="2" face="Arial">have monopolized the talk show circuit</font></span>
B.<div>exploit the weaknesses in human nature</div>
C.appear at different times of the day
D.are targeted at different audiences
正确答案:————30.[]<font face="Arial">The “balance of nature” is not an empty phrase. Nature provides a population to occupy a suitable environment and cuts down surplus population to fit the available food supply. One means of reducing surplus population is predators(食肉动物); others are parasites(寄生虫) and diseases. Also, population density produces nervous disorders and even drivers animals to mass migrations, like the lemmings(旅鼠) of Norway who plunge(跳入) into the sea.<br />That predators populations increase to control other animals has long been known. Many years ago, the Hudsons Bay Company records revealed that the fox population went up and down about a year after the rabbit population had gone up and down.<br />Sometimes a situation occurs in which the predator population is reduced to a level below that which nature can readily replace. On Valcour Island in Lake Champlain (New York), a costly campaign resulted in the elimination of predatory animals only to have birds and small animals (including grouse(松鸡) and hares, popular game) increase for four years afterward. Then, lacking predator control, nature resorted to disease to cut down these populations. <br />Jamaica had an example of natures persistence in providing animals for existing habits. Sugar planters, about 75 years ago, imported mongooses(猫鼬) to control rats. The mongooses killed off the rats and, with plentiful food, multiplied. Rats became scarce and the mongooses ate lambs, kids, puppies(小狗)，and wildlife. Eventually, food became scarce and the mongooses’ population declined.<br /></font>
(1)The phrase “balance of nature” (Line 1, Para. 1) means ____________.
A.<font face="Arial">reducing the population of predators</font>
B.<font face="Arial">keeping the right number of animals for the right amount of food</font>
C.<font face="Arial">keeping the ration of small game to predators</font>
D.<font face="Arial">driving animals t mass migrations</font>
正确答案:————
(2)The fact that number of predators has much to do with that of other animals ______.
A.<font face="Arial">is not recent knowledge </font>
B.<font face="Arial">has just been learned</font>
C.<font face="Arial">has not proved yet</font>
D.<font face="Arial">is not important now</font>
正确答案:————
(3)When predators control fails, nature brings animal population into balance by _______.
A.<font face="Arial">eliminating the number of predators</font>
B.<font face="Arial">increasing the number of other animals</font>
C.<font face="Arial">seeping the help of disease to reduce other animals</font>
D.<font face="Arial">replacing the number of predators immediately</font>
正确答案:————
(4)When the mongooses in Jamaica killed off the rats they ___________.
A.<font face="Arial">attacked humans </font>
B.<font face="Arial">ate the sugar crop</font>
C.<font face="Arial">became problems themselves</font>
D.<font face="Arial">had nothing to eat</font>
正确答案:————
(5)It is implied in the passage that ___________.
A.<font face="Arial">sugar planter imported mongooses to control rats</font>
B.<font face="Arial">man should never kill animals</font>
C.<font face="Arial">man has complete control over nature</font>
D.<font face="Arial">to upset the balance of nature can be troublesome</font>
正确答案:————
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