The lake will be further polluted unless some measures ______.
A will be taken B are taken C were taken D had been taken
The lake will be further polluted unless some measures ______.
A will be taken B are taken C were taken D had been taken
B
这是unless引起的状语从句，主句用了一般将来时，从句用一般现在时，这里要用被动形式，所以选B。