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标题: 还是GWD [打印本页]

作者: xingxc11 时间: 2011-9-21 19:46
标题: 还是GWD
GWD17-Q31:

The agreement, the first to formally require industrialized countries to cut emissions of gases linked to global warming, is a formal protocol by which 38 industrialized countries must reduce emissions of these gases by 2012 or face heavy penalties.

A.by which

B.for which

C.under which

D.such that

E.wherein

答案是C 请问B哪里错了呢？为何选C？望大牛们指导。

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