作业帮excuse me ,whose book is this --it __ be john's .it has his name on it.A.must B.need C.can't D.can
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excuse me ,whose book is this --it __ be john's .it has his name on it.A.must B.need C.can't D.can
excuse me ,whose book is this --it __ be john's .it has his name on it.
A.must B.need C.can't D.can
excuse me ,whose book is this --it __ be john's .it has his name on it.A.must B.need C.can't D.can
选A 后面跟上了理由,说明可以确认,所以用must
A. 对一件事肯定推测用主+ must +动词原形+其他
对一件事有把握的否定推测是：主+ can't +动词原形+其他
有后面的话可知这是肯定测测，故：A
选A：必须是，一定是
因为后面提到：
it has his name on it.
书上有他的名字。
其他选项意思都不对。