4.It is said that there are only eight ________ (行星) now.

3.This creature’s _________(生长环境)is the jungle.

2.I think zoos can ___________(提供)homes for many endangered animals.

1.In1972, it was ___________(发现)that they were endangered .

5.　What caused the “London Killer fog” of 1952?　 ___________________

A. It rained for a long time.　　　　　　　

B. It didn’t rain for a long time.

C. A warm air covered southern England with the freezing-cold air below.

D. The traffic stopped.

4.　In this passage the underlined word “humidity” means_______.

A.　温度　　　　 B.　降水　　 C. 风速　　　 D. 气压

3.　How long did the “London Killer fog” last?　 _____________.

A.　About one month　　　　　　　　　　　　 　B.　About two weeks

C.　About five days　　　　　　　　　　　　　　 D.　About half a month

2.　Which of the following disasters did the writer experience for himself?　 __________

A.　The eruption　　　　　　　　　　　　　　 B.　Hurricane Andrew in Florida

C.　The floods in the American Midwest;　　　　　 D.　The “London Killer fog” of 1952.

1.　Which of the following doesn’t belong to the nature disaster?　 __________

　A.　The flood　.　　　　　 B.　The air crash　.　　　 C.　The earthquake　.　　　　 D.　The hurricane.

5.(　 ) What can be inferred from the passage?　 ____________

A. The hummingbird feeds itself as a bee does.

B. The hummingbird is careful with its home.

C. The hummingbird cannot just fly forward but also backward.

D. The hummingbird lays eggs in match boxes.

(D)I often heard or read about natural disasters-the eruption(爆发)of Mount St. Helens; a volcano(火山)in the state of Washington; Hurricane(飓风)Andrew in Florida; the floods in the American Midwest; terrible earthquakes all over the world; huge firs; and so on. But I’ll never forget my first personal experience with the strangeness of nature-the “London Killer fog” of 1952.It began on Thursday, December 4, when a warm air covered southern England. With the freezing–cold air below, a heavy fog formed. Pollution from factories, cars, and coal stoves mixed with the fog. The humidity was terribly high, and there was no breeze(微风)at all. Traffic stopped. People couldn’t see, and some walked onto the railroad tracks or into the river. It was hard to breathe, and many people got sick.

　　 Finally on Tuesday, December 9, the winds came and the fog went away. But after that, even more people got sick. Many of them died.