Welcome to the World Expo which will take place in Shanghai May 1 October 31.A. during; o

问题补充：

Welcome to the World Expo, which will take place in Shanghai May 1

October 31.

A. during; on

B. from; to

C. between; of

D. on; till

答案：

A. during; on

(答案→)B. from; to

C. between; of

D. on; till

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