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题型：单选题 题类：常考题 难易度：普通
人教版（PEP）小学英语四年级下册Unit 3 随堂练习
—Yes, it is.
They {#blank#}1{#/blank#} （were/weren't）dirty then.
They {#blank#}2{#/blank#} （are/aren't）clean now.
—He's a teacher.
Tom 和Jerry 正在玩"你画我猜"的游戏， 他们画了一些学习用品， 想象一下他们会说些什么?
Tom: What's this? Is it a ...?
Jerry: ...
Tom: ...
Jerry: ...... ...
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