It is thought that a new system the place of the old one in that company. But things are

问题补充：

It is thought that a new system the place of the old one in that company. But things are getting worse and worse.

A. must have taken

B. will take

C. won’t take

D. had taken

答案：

(答案→)A. must have taken

B. will take

C. won’t take

D. had taken

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