It's necessary that measures at once to help people understand global warming is affecting our life to an increasingly high degree. A. must be taken B. be taken C. should take D. are taken 题目和参考答案——青夏教育精英家教网—

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It's necessary that measures _____ at once to help people understand global warming is

affecting our life to an increasingly high degree.

A. must be taken B. be taken C. should take D. are taken

解析:

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