It's a (use) book. You'd better read it carefully. 题目和参考答案——青夏教育精英家教网—

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3. It's a _________ (use) book. You'd better read it carefully.

3. useful

题目来源：同步导学案课时练九年级英语上册人教版 > Section A (1a~2d)

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科目：初中英语 来源： 题型：