Malaysia Airlines Flight 370 ___________ course and turned back toward Kuala Lumpur -- but there were no indications from the pilot that he was doing so.

A. must have changed B. could have changed

C. might have changed D. should have changed.

 

C

【解析】

試題分析:句意：馬航370客機(jī)可能已經(jīng)改變航向，折返吉隆坡——但是沒(méi)有飛行員這樣做的跡象。A肯定做過(guò)某事；B本來(lái)有可能做（但是沒(méi)做）；C可能做過(guò)；D本應(yīng)該做（但是沒(méi)做）。根據(jù)破折號(hào)后可知這是猜測(cè)可能發(fā)生過(guò)的事情，故答案選C。

考點(diǎn)：考查情態(tài)動(dòng)詞用法。

 

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