摘要： Some volunteers from Beijing arrived in Shanghai April 29 to work for the World Expo. A. on B. at C. of D. to
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Some volunteers from Beijing arrived in Shanghai _____ April 29 to work for the World Expo.
A. on B. at C. of D. to
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Some volunteers from Beijing arrived in Shanghai _____ April 29 to work for the World Expo.
A. on B. at C. of D. to
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Some volunteers from Beijing arrived in Shanghai _____ April 29 to work for the World Expo.
| A．on | B．at | C．of | D．to |