全新版大学英语 视听阅读4Unit1答案.docx

全新版大学英语_视听阅读4Unit1答案Unit 1
This story is set in the central and western ., particularly in the states of Texas, Oklahoma, Kansas, Nebraska, North and South Dakota, and Wyoming as well as the Rocky Mountains.
In the 1800s, the Rocky Mountain locust brought massive destruction to Western settlers. Then, the insects suddenly disappeared almost without a trace. Now scientists hope to find a reason for the locust's extinction. What caused the Rocky Mountain locust to disappear? Where will the scientists find the answers?
I. Locusts! Read the paragraph. Then match each word with the correct definition.
Many places in the world regularly experience plagues of locusts that can devastate entire countries. Locusts move in huge swarms, invade entire regions, and usually consume everything in their path. One swarm of locusts containing trillions of individual insects can eat thousands of tons of vegetation a day. Locusts are one of the world's most destructive insects, but they themselves are sometimes destroyed. In the 1800s, for example, the Rocky Mountain locust mysteriously became extinct.
1. plague ___E___
2. locust ___G___
3. devastate ___C___
4. swarm ___E___
5. trillion __A____
6. vegetation __F____
7. extinct ___B___
A. 1,000,000,000,000
B. no longer in existence
C. cause extreme damage
D. any widespread cause of misery, suffering, or death
E. a large group, usually of insects
F. the plant covering an area
G. an insect noted for flying in large groups and destroying crops
II. The Rocky Mountain Locust Mystery. Read the paragraph. plete the definitions with the basic form of the underlined words or phrases.
Dr. Jeff Lockwood is an entomologist who is particularly interested in the disappearance of the Rocky Mountain locust. The species was mysteriously wiped out in the late 1800s and there aren't many clues as to why it happened. By studying locust specimens under a microscope and by taking DNA samples from the dead locusts, Lockwood aims to find out why the Rocky