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题型：语法填空（单句） 题类：常考题 难易度：普通
人教版（新课程标准）高中英语必修2 Unit 4同步练习一
—Not at all. It couldn't have been ______.
—I agree. If we can't avoid it, the situation will get ________ as time goes on.
—Ji'an, it has ______ air and it's not as noisy as Nanchang.
—I've never had ________one before.
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