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【題目】-–Mary knows the city quite well.

--She______ well have been there before.

A.needB.couldC.shouldD.may

【答案】D

【解析】

考查情態(tài)動詞辨析。句意：——Mary非常了解這個城市。——她肯定以前在那里呆過。may have done過去可能做過某事。表示對過去的肯定猜測。need have done本需要做某事卻沒做；could have done本可以做某事卻沒做；should have done本應該做某事卻沒做。故選D。

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