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题型：单选题 题类：常考题 难易度：普通
北师大版（一起点）小学英语三年级下册Unit 10同步练习（2）
— I'm ______things.
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!
{#blank#}1{#/blank#}
—They are doing kung fu.
I{#blank#}1{#/blank#} a storybook{#blank#}2{#/blank#}.
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