【題目】—The zookeeper was really annoyed with me.

—How could he have been if you______stones at the animals?

A. didn’t throwB. don’t throw

C. hadn’t thrownD. haven’t thrown

【答案】C

【解析】

試題分析：考查虛擬語氣。句意：——動物管理員真的讓我生氣。——如果你不向動物扔石頭，他怎么會這樣？表示與過去事實相反的假設(shè)用過去完成時，故選C。

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