摘要：22．At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions it was too late. A．when B．after C．until D．before
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At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions________it was too late.
- A.when
- B.after
- C.until
- D.before
At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions it was too late. w ww.ks 5u.co m
A．when B．after C．until D．before
查看习题详情和答案>>At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions ______ it was too late. w ww.ks 5u.co m
A．when B．after C．until D．before
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