A.C.industrial spills

B.B.littering

C.D.agricultural runoff

D.

A.manufacturing emissions

正确答案：B.littering

2、Which hydroelectric dam is the world’s largest power station？

A.B.Itaipu hydroelectric power plant

B.

A.The Chinese Three Gorges Dam.

C.D.Vajont Dam

D.C.Grande Dixence Dam

正确答案：A.The Chinese Three Gorges Dam.

3、Which of following description related to “Kennedy’s moon-shot speech” is NOT true？

A.

A.Kennedy is US President John F.Kennedy.

B.C.Kennedy challenged Congress and the American people to put a man on the moon

C.D.Kennedy was sent to the moon.

D.B.The speech was held on May 25， 1961.

正确答案：D.Kennedy was sent to the moon.

4、Which of following is not about the central idea of Text A of Unit 5？

A.

A.Water is important resource.

B.C.Agriculture needs water for irrigation.

C.D.Conserve water first.Then， follow it up with new solutions.

D.B.Getting water right is the great challenge.

正确答案：C.Agriculture needs water for irrigation.

5、In this class， we have learned one skill for fast reading， helping locate the answer by key words.What is it？

A.B.Skimming

B.C.Skipping

C.D.Surveying

D.

A.Scanning

正确答案：D.Surveying

6、He writes on both sides of the sheet to（）paper.

A.B.convert

B.C.conserve

C.D.consent

D.

A.converse

正确答案：C.conserve

7、Already there are many（）fuel vehicles on the market， powered by anything from solar power to natural gas.

A.C.alternate

B.

A.alterable

C.B.alternative

D.D.alterative

正确答案：B.alternative

8、I’m feeling a little depressed at the moment， but I’m sure good times are（）.

A.B.at the corner

B.D.on the corner

C.C.around the corner

D.

A.in the corner

正确答案：C.around the corner

9、（）one task， we started another one.

A.B.To have completed

B.

A.To complete

C.D.Being completed

D.C.Having completed

正确答案：C.Having completed

10、The bus was held up by the traffic jam，（）.

A.

A.thus causing the delay

B.D.caused the delay

C.C.so that caused the delay

D.B.to cause the delay

正确答案：A.thus causing the delay

11、失去爆破，是指当一个爆破音后面紧跟一个爆破音、摩擦音、破擦音、鼻辅音、舌边音时，前一个爆破音：（）。