大学英语四级模拟试卷第05组（阅读4）

Passage 4
Questions 36 to 40 are based on the following passage.
The manner in which desert locust plagues develop is very complex.The two most important factors in that development are meteorology and the gregariousness of the insect.Since locusts breed most successfully in wet weather,rain in the semiarid regions inhabited by the desert locust provides ideal breeding conditions for a large increase in population.This increase must be repeated several times in neighboring breeding areas before enough locusts crowd together to form a swarm.As the supply of green,palatable food plants decreases to ward the end of the rainy season,the locusts become even more concentrated.They move on to other warm,damp,verdant places where they settle,feed,and reproduce.As this process is repeated a swarm eventually develops.Plagues are unpredictable and irregular because the meteorological patterns favorable to crowding are themselves irregular.
36.The passage deals primarily with desert locust swarms and their____ .
A)plaguesB)reproductionC)formationD)unpredictability

37.根据作者，下列哪一项不是沙漠蝗群增长的重要因素？丰富的食物供应。人口大量增加。半干旱地区的雨。蝗虫的群居本性。

38.根据这篇文章，可口的食物植物数量的减少导致____。
A)蝗虫数量的减少
B)当地蝗虫数量的减少
C)蝗虫密度的增加
D)蝗虫繁殖的增加……

39.从文章中可以推断，在少雨或无雨的时期，蝗虫的数量会减少。更小、更活跃、更不可预测的

40.The next paragraph would most probably deal with ____.
A)the gregarious nature of locusts
B)rain patterns in the desert
C)the type of food plants preferred by locusts
D)the control of locust plagues 位律师回复