28. The water will be further polluted unless some measures .A. will be takenB. are takenC

发布时间：2020-08-16 06:37:02

 
28. The water will be further polluted unless some measures     .
A. will be taken
B. are taken
C. were taken
D. had been taken

网友回答

A. will be taken
(答案→)B. are taken
C. were taken
D. had been taken
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