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题型：选词填空（单句） 题类：常考题 难易度：普通
仁爱科普版初中英语九年级下册Unit 5 Topic 2 He is really the pride of China. Section C课时作业
—I'm not sure. It ________ my parents' time.
—At 2:00 pm. I heard the_____ of the fire engine at that time.
—Well, I have _____________homework to do.
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