问题

Who’s that man in our classroom It ________ be Mr.Brown. He is much taller.— You mean the man in white He is an exchange studentfrom England.
A:can
B: may
C:can’t
D:mustn’t
B: may
C:can’t
D:mustn’t
正确答案是:
同类题型
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y up, I think it’s going to rain. — ______ . The skies are dark andcloudy.
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