China is trying to find ways to take care of the children parents have left their homes to work in cities.
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推荐题目
The skirt ____ she is wearing today was a birthday present from her mother.
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---You’ve chatted for nearly two hours. --- Yeah. We’re talking about the things ______ happened yesterday.
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I think this is the most interesting thing _____ has happened to us .
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–Do you know the boy ___ is standing under the tree?-Yes, he is my friend, Peter.
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