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题型：单选题 题类：常考题 难易度：普通
外研版（一起点）小学英语六年级下册Module 6 Unit 2同步练习
—________
— {#blank#}1{#/blank#}(Yes, No), I can't.
—OK.
Sarah: Yes, he does. My brother and I think walking is green and healthy.
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