【題目】I don't know whether you happen ____ it, but I'm going to study in USA this September.

A. to be heard B. to be hearing

C. to hear D. to have heard

【答案】D

【解析】

考查不定式的時(shí)態(tài)辨析。整句話的意思是“我不知你是否已聽說了……”。要體現(xiàn)不定式的動(dòng)作先于謂語發(fā)生或者應(yīng)該已發(fā)生，不定式要用完成形式。故選D。

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