According to the Secretary-General the American government has______.A.tried its best to

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According to the Secretary-General, the American government has______.

A.tried its best to persuade the Congress to pass a bill on global warming

B.raised American people"s awareness about global warming

C.been searching for a successor to the Kyoto treaty

D.promised that the Kyoto treaty would expire in 2015

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热搜:medline数据库中to字段是表示非英文文献的原文题名