.. Shanghai celebrates one year countdown to the opening of World Expo on May 1 200

问题补充：

.

. Shanghai celebrates one year countdown to the opening of World Expo on May 1,.

A. the; /

B. /; the

C. the; the

D. the; a

答案：

A. the; /

B. /; the

(答案→)C. the; the

D. the; a

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