题目内容

—Look at the boy running on the ground. Is it David?
—It      be him. I saw him go to the teacher’s office just now.
A．mustB．mustn’tC．can’tD．might
C

试题分析：must必须，一定；mustn’t禁止；can’t不能，不可能；might可能，也许。句意：看这个在操场上跑的男孩。是戴维德吗？根据下文，我刚才看见他去老师的办公室了。可知前文表示肯定的否定语气，故选C。
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