题目内容

10．Listen!Helen is singing in the next room．It ____ be Helen．She has gone to Beijing．（　　）
A．mustB．can'tC．mightD．should

分析 -听！Helen正在隔壁房间唱歌--不可能是Helen，她已经去了北京．

解答 答案：B
结合题干She has gone to Beijing她已经去了北京．可知前面判断不可能是Helen，情态动词表否定用can't不可能，故答案为B．

点评 熟悉情态动词表判断的用法，正确理解题意，给出正确答案．

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