--Is this soccer ball Jack's--It___be his because his name is on the ballA.can B.can't C.must D.mustn't

问题描述:

--Is this soccer ball Jack's
--It___be his because his name is on the ball
A.can B.can't C.must D.mustn't

C
must表示非常肯定的猜测.后面说他名字在上面,一定是他的球