2. 外语
  3. Something must be clone ______ pollution, otherwise the world won’t be fit for people to live in.

Something must be clone ______ pollution, otherwise the world won’t be fit for people to live in.

admin2012-05-08  51
问题 Something must be clone ______ pollution, otherwise the world won’t be fit for people to live in.
选项 A、with
B、for
C、about
D、on
答案C
解析
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