You look so beautifulin red．This dress really suits you．题目和参考答案——青夏教育精英家教网—

题目内容

16．You look so beautifulin red．This dress really suits you．

分析你穿着红衣服很漂亮，这件裙子很适合你．

解答答案：beautiful．
后面的句子说This dress really suits you，所以你穿着这件裙子很漂亮；填形容词作表语；故答案为beautiful．

点评首字母填空题考查的是词汇的记忆和运用能力，平时要注意积累和运用．同时还要注意提示字母．

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7．It was Darwin's fortune that allowed him to do his research without worrying about ______ he would have bread and cheese．（　　）

4．How do predators （猎食动物） affect populations of the prey （猎物） animals？The answer is not as simple as might be thought．The Moose（麋鹿） reached Isle Royale in Lake Superior by crossing over winter ice and bred freely there in isolation without predators．When wolves later reached the island，naturalists widely assumed that the wolves would play a key role in controlling the moose population．Careful studies have demonstrated，however，that this is not the case．The wolves eat mostly old or diseased animals that would not survive long anyway．In general，the moose population is controlled by food availability，disease and other factors rather than by wolves．
When experimental populations are set up under simple laboratory conditions，the predator often wipes out its prey and then becomes extinct itself．However，if safe areas like those prey animals have in the wild are provided，the prey population drops to low level but not extinction．Low prey population levels then provide inadequate food for the predators，causing the predator population to decrease．When this occurs，the prey population can rebound．In this situation the predator and prey population may continue in this cyclical pattern for some time．
Population cycles are characteristic of small mammals，and they sometimes appear to be brought about by predators．Ecologists studying hare populations have found that the North American snowshoe hare follows a roughly ten-year cycle．Its numbers fall tenfold to thirty in a typical cycle，and a hundredfold change can occur．Two factors appear to be generating the cycle：food plants and predators．
The preferred foods of snowshoe hares are tender willow branches．As the hare population increases，the quantity of these branches decreases，forcing the hares to feed on low-quality high-fiber food．Lower birth rates and low growth rates follow，so there is a corresponding decline in hare abundance．Once the hare population has declined，it takes two to three year for the quantity of branches to recover．
A key predator of the snowshoe hare is the Canada lynx．The Canada lynx shows a ten-year cycle of abundance（大量） that parallels the abundance cycle of hares．As hare numbers fall，so do lynx numbers，as their food supply decreased．
Predators are an essential factor in maintaining communities that are rich and diverse in species．Without predators，the species that is the best competitor for food，shelter，and other environmental resources tends to dominate and exclude the species with which it competes．This phenomenon is known as"competitor exclusion"．However，if the community contains a predator of the strongest competitor species，then the population of that competitor is controlled．Thus even the less competitive species are able to survive．From the stand point of diversity（多样性），it is usually a mistake to eliminate a major predator from a community．

73．The author uses the example of the moose and wolves on Isle Royale toB．
A．provide evidence that predators influence prey populations
B．question the belief in the effect of predators on prey populations
C．demonstrate predator population grows faster than that of the prey
D．prove that studies of isolated populations tend to be useful
74．The word"rebound"in the passage is closest in meaning toD．
A．React
B．Resist
C．Remain
D．Recover
75．Which of the following is true according to the passage？A
A．Laboratory results can't explain the changes in predator and prey populations of the wild．
B．The growth of hare population may lead to a corresponding increase in its birth rates．
C．The experimental environments can promote the growth of predator and prey populations．
D．The existence of a major predator in a community is a threat to the diversity of species．
76．What can we conclude from the passage about the cycle of the Canada lynx？C
A．When hare numbers decrease，lynx numbers increase．
B．It has a great effect on the number of snowshoe hare．
C．It closely follows the cycle of the snowshoe hare．
D．It is not directly related to the availability of lynx food．
77．What is the best title of this passage？B
A．What role predators play in keeping competitor species．
B．Whether predators have an impact on prey populations．
C．A study of the populations of the predator and prey animals．
D．Contributing factors of the changes in animal populations．

11．There is much discussion about the necessity of daily homework for students．Some say homework is necessary since only practice （41）makes （make） perfect，while others disagree．In my opinion，daily homework is necessary for students．However，this might be misleading that one may believe all forms of homework （42）are necessary．Actually，only proper amount of homework in proper form s （43）acceptable （ accept）； some homework may not only fail to help the students，but on
（44）thecontrary bore them so much that they may lose their interest in studying．"Proper"homework，in my opinion，should （45）very（vary） in its forms，（46）which might be some extensive reading，a paper，or even just a game，as well as other ordinary exercise．And it should leave enough （47）freedom （free） to th students so that they could do things they really like to do with selfmotivation，rather than unwillingness．We should always remember that homework is something for us to guide the students，rather than （48）drive （drive） them．Only if a teacher （49）keeps （keep） this （50）inhis/her mind，the homework could be of most help to the students．

1．The new teacher is kind and professional，which has left a good impression on his students．

8．According to the report，only 300people survived in the earthquake last week．

5．工作人员为那些家园被毁的幸存者盖起了避难所．（用定语从句翻译）Workers built shelters for survivors whose homes had been destroyed．

6．For many cities in the world，there is no room to spread out further，__________ New York is an example．（　　）

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