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题型：填空题 题类：常考题 难易度：普通
人教版(PEP)英语六年级下册Unit4 Then and now单元测试
When I was a child, I couldn't .
{#blank#}1{#/blank#}
You must look {#blank#}1{#/blank#}first, and then {#blank#}2{#/blank#}.
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