The water will be further polluted unless some measures ________.

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问题 The water will be further polluted unless some measures ________.

选项 A、will be taken
B、are taken
C、were taken
D、had been taken

答案B

解析 考查时态。在时间和条件状语从句中,主句用将来时,从句用一般现在时。
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