单项选择题

As a signatory to the Kyoto pact on climate change, Britain __ carbon emissions by 20 percent by 2010.

A．had reduced
B．must reduce
C．may reduce
D．ought to have reduced
<上一题 目录 下一题>
热门 试题

单项选择题
The President declared that the nation's energy demands __ so rapidly since 1968.
A．have grown .
B．had grown
C．grows
D．has grown
单项选择题
While he was in the office, he preferred __ something __nothing.
A．to do, to do
B．to do, doing
C．doing, to do
D．doing, to doing
相关试题