题目内容
9. ―What has made him upset recently?
― alone to face a troublesome case.
A. Left B. Being left
C. Having left D. To leave
9. B考査非谓语动词。句意:"什么让他最近感到不安?""被单独留下面对棘手的事情。"因为问句是对主语的提问,所以回答的是主语的内容,用动名词作主语,he和leave之间是被,关系,用动名词的被动形式作主语,答语是简略回答,完整形式是:Being left alone to face a troublesome case has madehim upset recently. 故选B。
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