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(gè)小男孩在玩捉迷藏的時(shí)侯意外地發(fā)現(xiàn)的.

解答 答案:B   The diamond mine和動(dòng)詞discover之間是被動(dòng)關(guān)系,所以要用被動(dòng)語態(tài).when he was playing hide-and-seek是過去進(jìn)行時(shí),是主句的時(shí)間狀語,所以要用一般過去時(shí)的被動(dòng)語態(tài).主句和從句的時(shí)態(tài)要保持一致.被動(dòng)語態(tài)的結(jié)構(gòu):be+及物動(dòng)詞的過去分詞;由于主語The diamond mine為單數(shù),應(yīng)用was discovered.故選B

點(diǎn)評(píng) 本題目要先分析出為什么用被動(dòng)語態(tài),然后分析用什么時(shí)態(tài),最后結(jié)合被動(dòng)語態(tài)的結(jié)構(gòu)解答,

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