9．Millions of pounds'worth of damage ______ by a storm which swept across the north of England last night．（　�。�
A．has been causedB．had been caused
C．will be causedD．will have been caused

分析 昨天晚上席卷英格蘭北部的暴風(fēng)雨造成了數(shù)百萬英鎊的損失．

解答 答案是A． 考查被動語態(tài)，根據(jù)句意損失是由暴風(fēng)雨引起的，damage與cause之間是被動關(guān)系，是從last night到現(xiàn)在"的結(jié)果，所以用現(xiàn)在完成時，故答案選A．

點(diǎn)評 被動語態(tài)由"助動詞be+及物動詞的過去分詞"構(gòu)成．被動語態(tài)的時態(tài)變化只改變be的形式，過去分詞部分不變．疑問式和否定式的變化也如此．掌握各種時態(tài)的被動語態(tài)是解題的關(guān)鍵．

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