—She looks very happy. She ______ have passed the exam.
--I guess so. It’s not difficult after all.
A.shouldB.couldC.mustD.might
C
考查虛擬語(yǔ)氣。句意:她看起來(lái)非常高興。她肯定是通過(guò)了考試!也率沁@樣。這畢竟不太難!皊hould+have+done”意思是“本來(lái)應(yīng)該做某事,而實(shí)際沒(méi)做;“could+have+done”表示對(duì)過(guò)去事情的假設(shè),意思是本來(lái)能夠做某事而沒(méi)有做;“must+have+done”表示對(duì)過(guò)去事情的肯定推測(cè),譯成“一定做過(guò)某事”; “might+have+done”表示對(duì)過(guò)去已經(jīng)發(fā)生的事情的推測(cè),might與may意思相同,但可能性更小。結(jié)合語(yǔ)境可知上文為肯定推測(cè),故選C。
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