Read the passage and choose the correct answer for each the question.I often hear or read about ‘natural disasters’ -the eruption of Mount St. Helen, a volcano in the state of Washington, Hurricane Andrew in Florida, the floods in the American Midwest, terrible earthquakes all over the world, huge fires, 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 high-pressure system of warm air covered southern England. With the freezing-cold air below, heavy fog formed. Pollution from factories, cars and coal stoves mixed with the fog. The humidity was terribly high, there was no breeze at all. Traffic such as cars, trains, boats 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 wind came and the fog went away. But after that, even more people got sick. Many of them died.Question21.Which "natural disaster' isn't mentionedin the passage? A. a tornado B. a volcano C. a flood D. a hurricane Question22.What is the writer's unforgettable personal experience? A. the London killerB. the heavy fog in London in 1952 C. a high-pressure system D. the strangeness of nature Question23.How long did the ‘London Killer Fog' last? A. For four days B. For five days C.For six days D. For a weekQuestion24.What didn't happen during the time of the ‘London Killer Fog'? A. Pollution B. Heavy rain C. Humidity D. Heavy fog Question25.Why did the traffic stop?A. Because of the rain B. Because of the windy weatherC. Because of the humid weatherD. Because of the heavy fog. III. WRITINGQuestion26. The people will protect the environment now. The environment will be niceA. If the people willprotect the environment now, the environment will be niceB. If the peopleprotect the environment now, the environment will be niceC. If the peopleprotect the environment now, the environment won’tbe niceD. If the peopleprotectsthe environment now, the environment are nice Question27. The storm destroyed many houses in this village last week.A. Many housesin this village were destroyed by the storm last night.B. Many housesin this village was destroyed by the storm last nightC. Many housesdestroyed by the storm in this village last night.D.Many houseswere destroyed last night by the storm.Question28.Although the weather was bad,the fooball match was not canceled.A.Despiteof the bad weather,the fooball match was not canceled.B. Despitethe bad weather, the fooball match was not canceled.C. Despite the weather was bad,the fooball match was not canceled.D. Despitethe bad weather, the fooball match was canceled.Question29.He said“ I like to do physics expriments now”A. He saidthat helikesto do physics expriments then.B. He saidthat helikesto do physics expriments now.C. He saidthat helikedto do physics expriments then.D. He saidthat helikedto do physics expriments then.Question30. If you don’t work hard, you won’t earn money.A. Unless you work hard, youearn money.B.Unless you don’t work hard, you won’t earn moneyC. Unless you work hard, you don’tearn moneyD. Unless you work hard, you won’tearn money