精英家教網 > 初中英語 > 題目詳情
The water in the river nearby will be dirtier than before if nothing __________.
A．has doneB．will be done
C．is doneD．was done
C

試題分析：句意:如果什么措施也不采取的話，附近河里的水將會比以前更臟。if如果，引導條件狀語從句，從句中用一般現(xiàn)在時表示將來；并且從句中的主語nothing和動詞do之間構成被動的關系，應該用被動語態(tài)，故選C。
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