Long time ago, our world was very beautiful. There were trees, flowers and rivers. It was very clean and tidy.  1 . We are living in a polluted environment, which is bad for out earth.   2  .The public has been calling for actions against pollution. Scientists have told us to protect out environment,  3 .
The earth is our only home. We should make it comfortable for ourselves and for our children in the future. Now nearly all of the countries are trying their best to stop pollution. Although they have done much, the progress is slow,   4 . No matter how difficult it is, we should try our best to fight against pollution. By working together,   5 .
根據(jù)短文內(nèi)容，從方框中選出能填入空白處的最佳選項，補全短文。（5分）

小題1:C
小題2:A
小題3:D
小題4:E
小題5:B

試題分析:
小題1:上文介紹了我們的世界很美好,下文說我們生活在一個污染的環(huán)境里,故此處需要一個轉(zhuǎn)折性的句子,選C.but,但是.
小題2:結(jié)合下文公眾已經(jīng)號召采取行動應(yīng)對污染,可知選A,人們真的很擔(dān)心這個問題.
小題3:結(jié)合上文科學(xué)家告訴我們保護(hù)我們的環(huán)境,可知選D,否則污染會變得越來越嚴(yán)重.
小題4:結(jié)合上文進(jìn)程很慢和下文不管它有多么困難,可知選E,在我們擁有一個整潔的世界之前還有一條很長的路要走.
小題5:結(jié)合上文,通過一起努力,可知選B,我相信……
點評：本文介紹了我們的世界污染越來越嚴(yán)重，號召我們每個人都行動起來，保護(hù)我們的環(huán)境。本文看起來較難，但是因為五個選項只給了五個答案，故我們答題中可采用排除法，由易到難，完成全文。
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