题目内容
It was playing computer games that cost the boy a lot of time that he __________ doing his lessons.
A. might have spent B. ought to have spent
C. must have spent D. could have spent
C
解析:
根据此对话的语境,此空应是“你不可能知道,你当时正在国外读书呢”。you couldn’t have是you couldn’t have known we were friends的简略形式。该句式表示对过去有把握的否定推测。A项表示“也许知道”;B项表示 “没必要知道”;D项表示“一定知道”。均不合题意。
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