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experiment took as five months and turned out great success. [ ] A.The; 不填 B.不填;

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experiment took as five months and turned out great success. [ ] A.The; 不填 B.不填;

________ experiment took as five months and turned out ________ great success.

[]

A.The; 不填

B.不填; a

C.The ;a

D.The; the

试题答案

答案:C