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题型：单选题 题类：常考题 难易度：容易
人教版（PEP）小学英语三年级上册第六单元Unit 6 Happy birthday！同步练习
—I'm seven years old.
John: ____________
— .
{#blank#}1{#/blank#}
—They are potatoes.
—________
—It is ______.
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