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13、Representatives of 192 countries held talks in Copenhagen on Dec. 8th , 2009, with the aim of

     the issues of greenhouse gas emissions（排放）

A．making promises of                                     B．making compromises on

C．making commitments to                              D．making contribution to

13、B

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Representatives of 192 countries held talks in Copenhagen on Dec. 8th , 2009, with the aim of

     the issues of greenhouse gas emissions（排放）

A．making promises of                                     B．making compromises on

C．making commitments to                              D．making contribution to

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