【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(dòng)詞辨析。句意：——Mary非常了解這個(gè)城市。——她肯定以前在那里呆過(guò)。may have done過(guò)去可能做過(guò)某事。表示對(duì)過(guò)去的肯定猜測(cè)。need have done本需要做某事卻沒(méi)做；could have done本可以做某事卻沒(méi)做；should have done本應(yīng)該做某事卻沒(méi)做。故選D。

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