问题
Look! The light in Mr. Brown’s office is still on. He be working there.—It be him. He has gone to America.
A:must; mustn’t
B:can; mustn’t
C:must; can’t
D:can; can’t;
B:can; mustn’t
C:must; can’t
D:can; can’t;
正确答案是：
同类题型
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