Oh, you are here. I you came back. A. don't know B. didn't know C. haven't known D. won't know 题目和参考答案——青夏教育精英家教网—

题目内容

Oh, you are here. I _______ you came back.

A. don't know B. didn't know

C. haven't known D. won't know

【答案】B

【解析】考查动词时态的用法。根据句意：“哦，你在这里，我不知道你回来了”，显然现在已经知道了，所以要用过去时，表示“原来”不知道，所以选择答案B。

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阅读理解。

Most people in America live in small groups. More than a quarter of homes in America have only one person in them. Some of these are old people, but some are people of twenty or thirty years old who would like to live alone. 35% of homes have two people in them; another 17% have three people. 15% have four people in them, and the others have five or more.

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