问题

Effective measures have been taken to prevent _______pollution.

A:exhausted gas
B:exhausting gas
C:exhaust gas
D:exhaustion gas

正确答案是：

同类题型

People were perhaps more honest a long time ago when life was very different from _________ it is today

下列各句句式按照括号内的要求转换后意思不变的一项是（）

up, Bill You __________upset.

.The little boy was found_________in his room the next day.

It was ____ that she couldn’t finish it by herself.