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

What about having a welcome party for our new friends—________.

．To decountries．

I don’t think ________is possible for us to get a taxi at this time of day.

Who is the classroom now—. Allthe students are on the playground(操场)

How was the weather then?—Hardly ______ off the plane when it started to rain.