单项选择题

We can conclude that ______.

A．civilization may be doomed if pollution is not controlled
B．pollution is more serious in Europe than it is in America
C．most people do not know that pollution is a serious problem
D．black snow is not so serious compared with white snow

<上一题目录下一题>

热门试题

单项选择题

The author mentions people dying of air pollution in ______.

A．Illinois
B．Pennsylvania
C．New Jersey
D．Washington

单项选择题

According to the author, America is a highly modern society, ______.

A．so people like it better than before
B．but there is still a big gap between different classes
C．all the people there lead a very happy life
D．all the industries and companies are in the hands of the goverment