全新版大学英语_视听阅读4_答案

全新版大学英语 视听阅读4 答案

Unit 1 The Perfect Swarm Unit 2 The Red Devils Unit 3 The Orient Express

Unit 4 The Varied Cultures of China Unit 5 Afghanistan's Heroic Artists

Unit 6 Natacha's Animal Rescue Unit 7 Firewalking Unit 8 Living in the Slow Lane

Unit 9 Alternative Energy Unit 10 Mars on Earth

Glossary

Unit 1

This story is set in the central and western U.S., 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. Then complete 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 Mountain locust suddenly disappeared from Earth.

1. a thing or fact that helps provide an answer to a question; evidence: clue

2. a person who studies insects: entomologist

3. an item that is an example of a larger group: specimen

4. destroy completely; cause to no longer exist: wipe out

5. a scientific instrument that uses lenses to make small objects appear larger: microscope

6. the material that carries the genetic information in the cells of each living thing: DNA

SUMMARY

The mystery of the Rocky Mountain locust has baffled scientists in North America for over 100 years. After

locusts completely devastated many parts of the United States in 1875, the entire species vanished from the

continent. Entomologist Jeff Lockwood is determined to solve this mystery. After traveling to the Rocky

Mountains and studying locusts frozen in glaciers, Lockwood begins to look at the mystery from a new angle.

Warming up

Teaching NOTES

1. Show students some pictures of locusts from the reading passage or other sources you can find.

2. Have students guess why the locusts in this video and the reading passage are called the perfect swarm.

3. Ask questions like ― Have you ever seen a locust?‖ and ― What do you know about locusts?‖

Grasshopper

There are hundreds of species of grasshoppers. These insects belong to the suborder Caelifera in the order

Orthoptera, and have antennae that are almost always shorter than their bodies, and short ovipositors—organs for

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