Has 　　　　　been decided when we are to hold the sports-meeting?A. that　　　B. this　　　C. it　　　D

问题补充：

Has been decided when we are to hold the sports-meeting?

A. that

B. this

C. it

D. what

答案：

A. that

B. this

(答案→)C. it

D. what

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