11.The diamond mine _______ accidentally by a little boy when he was playing hide-and-seek.(  )
A.discoveredB.was discovered
C.has been discoveredD.would discover

分析 鉆石礦是被一個小男孩在玩捉迷藏的時侯意外地發(fā)現(xiàn)的.

解答 答案:B   The diamond mine和動詞discover之間是被動關系,所以要用被動語態(tài).when he was playing hide-and-seek是過去進行時,是主句的時間狀語,所以要用一般過去時的被動語態(tài).主句和從句的時態(tài)要保持一致.被動語態(tài)的結構:be+及物動詞的過去分詞;由于主語The diamond mine為單數(shù),應用was discovered.故選B

點評 本題目要先分析出為什么用被動語態(tài),然后分析用什么時態(tài),最后結合被動語態(tài)的結構解答,

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