单项选择题

This passage is primarily concerned with______.

A．the greenhouse effect
B．the bunting of fossil fuels
C．the potential effect of air pollution
D．the likelihood of a new ice age
<上一题 目录 下一题>
热门 试题

单项选择题
As far as the greenhouse effect is concerned, the author______.
A．shares the same view with the scientists
B．is uncertain of its occurrence
C．rejects it as being ungrounded
D．thinks that it will destroy the world soon
单项选择题
The word offset in the second paragraph could best be replaced by______.
A．slip into
B．make up for
C．set up
D．catch up with
相关试题