Question

    Scientists who study insects are troubled now. All across the United States, bees are leaving their hives and never returning. According to the beekeepers across the country, 25 to 40 percent of the bees in the United States have left their hives since last fall. So far, no one can explain why.

Bees play an important role in the production of about one third of the food we eat. A large number of plants not only need people’s care but also need bees that spread pollen from flower to flower. Without this process, a plant can’t produce seeds or fruits.

Now, a group of scientists and beekeepers are trying to find out what has happened. By examining bees’ behavior and health, they hope to find out what has caused the bees’ disappearance and to prevent bees from disappearing in the future.

Some people think the disappearance may be caused by disease. According to Dewey Caron, a researcher at the University of Delaware, the bees have signs of troubled immune systems (免疫系统) inside their bodies. But why would troubled immune systems cause bees to leave their hives? After all, when people are sick, they want to stay at home. Caron guesses that sick bees may have difficulty figuring out where their homes are.

“Another cause may be some chemicals that farmers use to kill unwanted insects on crops.” says Jerry Hayes, who works at the Florida Department of Agriculture.

1.The underlined part “this process” refers to ________.

A.people’s care

B.bees’ leaving their hives

C.bees’ spreading pollen from flower to flower

D.beekeepers’ raising bees

2.It can be inferred from the passage that ________.

A.the use of some chemicals is the cause of the bees disappearance

B.sick bees are not able to find where their hives are

C.it’s not known yet why a lot of bees are leaving their hives and never returning

D.there will be no bees in America in the near future

3.What would be the best title for the passage?

A.Bees,Humans’ Friends

B.Scientists Are Interested in Bees

C.Why Are Bees Leaving?

D.How Do Bees Send out Information?

4.The passage is most probably taken from ________.

A.science news

B.a public advertisement

C.a book on advanced technology

D.a business report

Answer

1.C

2.C

3.C

4.A

【解析】

本文为一篇说明文。文章主要探讨了美国的蜜蜂为什么会离开蜂巢不再返回。

1.

词句猜测题。这里需要猜测this process的意思，因为process前用了定冠词，所以一定是指代前文出现的内容。根据A large number of plants not only need people’s care but also need bees that spread pollen from flower to flower.可知，许多植物不仅需要人们的照料，还需要蜜蜂在花间传播花粉。由此可知，this process指的是“蜜蜂在花间传播花粉”。故选C。

2.

推理判断题。根据第三段中的By examining bees’ behavior and health, they hope to find out what has caused the bees’ disappearance and to prevent bees from disappearing in the future.可知，通过检查蜜蜂的行为和健康状况，他们希望找出蜜蜂消失的原因，并防止蜜蜂在未来消失。由此推知，目前还不清楚为什么很多蜜蜂离开蜂巢再也不回来。故选C。

3.

主旨大意题。本文的主旨句为第一段中的All across the United States, bees are leaving their hives and never returning.(在美国各地，蜜蜂都离开了蜂巢，再也没有回来)，后面的段落均是为了解开这一秘密而展开。由此可知，Why Are Bees Leaving?(蜜蜂为什么离开？)适合做本文最佳标题。故选C。

4.

推理判断题。文章主要讲介绍的是蜜蜂为何离开蜂巢不再回归，应该属于科普知识类的文章。故选A。