问题
选择题
Some volunteers from Beijing arrived in Shanghai _____April 29 to work for the World Expo. [ ]
A. on
B. at
C. of
D. to
答案
答案：A
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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
答案：A