Air pollution is getting more and more serious, so we must take action ________
题型:不详难度:来源:
Air pollution is getting more and more serious, so we must take action ________ it is too late.A.before | B.after | C.until | D.when |
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答案
A |
解析
选A 考查状语从句。句意:空气污染越来越严重,所以我们必须趁现在还来得及的时候采取行动。根据句意可知,应用before,表示“在……以前”。 |
举一反三
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