【題目】—If we don’t protect the environment, plants and animals will die out on Earth one day.

—So everyone should try his best to do something for the environment.

A.appearB.disappearC.happen

【答案】B

【解析】

句意：——如果我們不保護環(huán)境，地球上的動植物總有一天會滅絕。——所以每個人都應該盡自己最大的努力為環(huán)境做點什么。

考查動詞。A. appear出現(xiàn)；B. disappear消失；C. happen發(fā)生；根據(jù)原句是滅絕，也就是消失不見了，所以用disappear消失，故選B。

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