【題目】Before the ship sank, some of the passengers _______ leave in time for the lifeboats.

A.couldB.mightC.were able toD.should

【答案】C

【解析】

考查情態(tài)動(dòng)詞。句意：在船沉之前，一些乘客及時(shí)離開(kāi)上了救生艇。分析句子可知， 表示許多乘客成功的離開(kāi)上了救生艇。was/were able to表示過(guò)去成功做成了某事。could也表示過(guò)去“能夠”，但成功與否未可知；might表示“可能”；should表示“應(yīng)該”，根據(jù)句意，故選C。

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