GWD-17-Q31?

马尔代夫

（1）     GWD-17-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.

 

1. by which
2. for which
3. under which
4. such that
5. wherein

 

C the best

请问介词under前置和从句里面什么搭配?

shanexin

简单的介宾结构作状语

gonghao

under formal protocol

马尔代夫

明白,谢谢