---I once got lost during my first visit to Beijing.
---Oh, did you? You ______ me as your guideA.might have askedB.could askC.would have askedD.would ask
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A解析试题分析：句意:--在我第一次参观北京时，我曾经迷路了。--哦，是吗？你可以请我当你的向导。might have done指过去可以做某事而未做；could do可能做；would have done 过去将要做某事；would do过去将要做某事。根据句意故选A。
考点：考查情态动词的用法。
点评：本题难度适中。情态动词的完成式是高中阶段的重难点之一，需要考生熟记它们的用法，在各类考试中经常出现，它主要用于表示对过去情况进行推测或责备等。
即学即练: —I heard the phone ringing in the office next door.
—You ________ it. They haven’t got a phone yet.
A.couldn’t hear B.couldn’t have heard
C.didn’t hear D.wouldn’t have heard
解析：B。由句意可知此处是对过去的事情表示推测，那么否定句用“can/could not+完成时”，故选B。