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-The man in charge knew nothing about the design and all his assistants had neve

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-The man in charge knew nothing about the design and all his assistants had neve

—Theman in charge knew nothing about the design and all his assistants had neverdone any designing work before.

—Oh,I'm afraid it ________ a success.

A.mustn't be

B.mustn't have been

C.couldn't be

D. couldn't have been

 

试题答案

答案：D

解析：

标签：allanddesignhisnever

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