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题型：单选题 题类：常考题 难易度：普通
（新版）人教新目标版（PEP）七年级英语上册Unit7 How much are these socks 单元测试（二）
am is are
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{#blank#}1{#/blank#}your friend thin{#blank#}2{#/blank#}heavy?
— Twenty percent of them ____ from China.
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