The World Expo was opened May 1st, 2010. A. in B. on C. at D. for——青夏教育精英家教网——

题目内容

The World Expo (世博会) was opened May 1st, 2010.

A. in
B. on
C. at
D. for

试题答案

B

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The World Expo (世博会) was opened May 1st, 2010.

A. in
B. on
C. at
D. for

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