摘要：Jack described his father, who a brave boy many years ago.as a strong-willed man. A. would be B. would have been C. must be D. must have been 答案D [解析]考查情态动词.must have done 表示对过去的肯定推测.句意:杰克将他的父亲描写成一个意志刚强的人.许多年前他的父亲一定是一个勇敢的孩子.

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