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题型：单选题 题类：常考题 难易度：普通
初中英语冀教版七年级英语下册Unit 8 Lesson 44 Volunteering in Summer同步练习
—Four times a week.
—Yes, he has been an engineer for thirty years.
—At least eight hours a night.
— Once a week.
—It's on the bed.
—____ is my sister.
—It is about 10 minutes by bus.
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