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题型：单选题 题类：常考题 难易度：普通
初中英语牛津版（深圳·广州）八年级下册Module 4 Discovery Unit 7 The unknown world同步练习
—They are fine.
—Well, let's find another one.
—I fell asleep before, but the sound of the heavy footsteps awoke me.
—Because they make our lives more convenient.
—Don't worry. I will help you after I finish doing the dishes.
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