题目内容

The flowers his friends gave him will die if _______ every day.
A.not wateringB.not wateredC.not to waterD.not being watered
B
考查状语从句的省略。补充完整是The flowers his friends gave him will die if they are not watered every day.因为从句主语和主句主语一致,并含有be动词,可把从句的主语和 be省略。所以选B。
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