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题型：单选题 题类：常考题 难易度：普通
江苏省常州市第五中学2011年九年级英语单选竞赛题
— No. I think it's difficult _____Bob thinks it's interesting.
— It will be worse we take action to protect the environment.
— Let's collect and put them in the right place they can be used conveniently.
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