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题型：单选题 题类：常考题 难易度：容易
江苏省昆山、太仓市2015-2016学年七年级下学期期末教学质量调研测试英语测试
一I'm not sure. I take a trip to the USA.
一 No, it _____ be him. He's in New York now.
—Sorry, I'm afraid you ________. Look at the sign "No swimming".
—I'm afraid I______ I have to look after my sister.
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