— Will you go to the World Expo in Shanghai by bullet train after the Examination?— I may

问题补充：

— Will you go to the World Expo in Shanghai by bullet train after the Examination?

— I may go by air.

A. Why not?

B. Not really.

C. How come?

D. Oh, great.

答案：

A. Why not?

(答案→)B. Not really.

C. How come?

D. Oh, great.

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