The water will be further polluted unless some measures ________．

The water will be further polluted unless some measures ________．

A.will be taken

B.are taken

C.were taken

D.had been taken

答案及解析： B

解析：

主句为一般将来时，unless引导的条件状语从句通常用一般现在时表示将来，而“措施”应该是“被采取”，故用被动语态。