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  3. The water will be further polluted unless some measures ______.

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 take measures意思为“采取措施”，本句应用被动语态。
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