---- What do you think of opening ceremony of the Shanghai.World Expo? ---- Oh it isp

问题补充：

---- What do you think of opening ceremony of the Shanghai.World Expo?

---- Oh, it isperfect one.

A. the, the

B. an, a

C. the, a

D. an, the

答案：

A. the, the

B. an, a

(答案→)C. the, a

D. an, the

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