Some volunteers(志愿者) from Beijing arrived in Shanghai       April 29 to work for the World Expo.
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on
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at
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of
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to
推荐题目
 Mike was born ____ February, 2005.
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of
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in
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on
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at
Gao Yan is__________ Zhao Fen and Li Min.
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in front of
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behind
C
between
D
on the right