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—Whose is this blue sweater?—It ___ be Hong Tao’s. His is white.
A.mayB.can’tC.mustD.mustn’t
B
   
试题分析:句意:这个蓝色的毛衣是谁的?那肯定不是洪涛的,他的是白色的。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His is white.可知是否定猜测,故选B。
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