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发现Cici老师Is your pencil under your chair？
Is your pencil under your chair？

Is your pencil under your chair？

2018-10-13    00'23''

主播： Cici老师

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上一期： KB1-U3-方位介词in，on，under，next to
下一期： Who's that/this？That/This is my ___.
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