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题型:单选题 题类:常考题 难易度:普通
高中英语-_牛津译林版-_高一下册-_模块3-_Unit 3Back to the past
—Sorry, I am not sure, but it ____________ be.
这是她第三次访问中国。
—I don't know. My computer _______ to the Internet in our office for a few days.
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