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题型：单选题 题类：常考题 难易度：困难
接力版（三年级起点）小学英语四年级下册Lesson 6 What is it doing? 同步习题
What are Tim and Jim doing? They are {#blank#}1{#/blank#} {#blank#}2{#/blank#} in the living room. They're {#blank#}3{#/blank#} {#blank#}4{#/blank#} too!
Look, they are {#blank#}3{#/blank#} {#blank#}4{#/blank#}.
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