Her father is a doctor. He works ________ a hospital.
A.on B.of C.to D.in
My brother spends all his spare time on his computer. I'm worried about ________.
A.him B.her C.them D.you
我尝试了老师的建议,我的听说能力提高了。
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长城是一个旅游的好去处。
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您想吃点什么?
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我爸爸打算照很多的照片。
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