摘要： The problem of carbon emission at Copenhagen Summit has aroused the public’s wide concern. A. discussed B. having been discussed C. being discussed D. to be discussed
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The problem of carbon emission ____ at Copenhagen Summit has aroused the public’s wide concern.
A. discussed B. having been discussed
C. being discussed D. to be discussed
查看习题详情和答案>>The problem of carbon emission ____ at Copenhagen Summit has aroused the public’s wide concern.
A．discussed B．having been discussed
C．being discussed D．to be discussed
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