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The lady in this photo _______ be over fifty! She looks so young!
A.mustn’tB.can’tC.mustD.can
B

试题分析:句意:这个相片中的女士肯定不超过50岁,她看起来那么年轻。must,can(could),may(maight) 可以表示猜测,must 表示肯定猜测,用于肯定句,肯定……,一定……;can’t,表示否定猜测,肯定不……,另外can(could),may(maight),表示可能性猜测,可能……。根据句意,可知是否定猜测,故选B。
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