填空题

According to the passage, fighting against greenhouse effect successfully requires ______.

【参考答案】

nations and individuals’ efforts。
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填空题
In December 2004, Science declared in an essay that ______.
单项选择题
A．Because there are many developing nations.B．Because people use so many motor vehicles.C．Because we have more and more industry.D．Because we are building more vehicles.
A．Because there are many developing nations.
B．Because people use so many motor vehicles.
C．Because we have more and more industry.
D．Because we are building more vehicles.
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