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—Whose shirt is this?
—It ______ be Li Lei’s. It is too big for him.
A.couldB.must
C.mightD.can’t
D

试题分析:句意:这是谁的衬衫。 它肯定不是李磊的,它对于他太大了。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It is too big for him.可知是否定猜测,故选D。
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