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题型:单选题 题类:常考题 难易度:容易

人教新目标(Go for it)九年级英语上学期期末试题

— 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
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