【题目】He have watched TV at home for 1 saw hint in the classroom.
A. shouldn’t B. couldn’t C. mustn’t D. may not
在线课程【答案】B
【解析】考查情态动词。他不可能在家看电视，因为我看见他在教室里。此处是对过去事情有把握的否定推测。couldn’t have done不可能已经做了某事，故选B。
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