Unit 6 Self-test
您好，在完成本单元的学习后，请您完成以下练习题。本练习题满分100分，将按10%计入形考成绩。
您可以反复练习多次，系统默认记录最高分。点击“提交所有答案并结束”按钮视为练习1次，每次练习无时间限制。
中途退出，保存答案已作出选择的题目会自动保存答案，下次进入后可对做过的题目进行修改，并继续上次答题，不计入练习次数。
一、选择填空：阅读下面的对话或句子，从A、B、C三个选项中选出一个能填入空白处的最佳选项。
1．— We have to stay at home for a whole day. Why not go out and have a walk?
—
It like a good idea.
It sounds like a good idea.
How is a good idea.
2．— Susan ,what do you think of my plan?
— _______________
It’s reasonable .
It’s pleasant.
It’s possible.
3．Have you filled in the application form your passport yet?
in
for
of
4．I suppose you know everything about that event, ________ ?
don’t you
do I
do you
5．There is no doubt __________Herbert is the most industrious student in our class.
whether
what
that
6． I’m a business trip for APEC summit, sir.
on
for
in
7．Cleaner heating system will in Beijing to control air pollution.
be sent
be covered
be established
8．Miss Liu doesn’t mind _______ your homework as long as it is done by yourself.
you to delay handing in
your delaying handing in
your delaying to hand in
9．Listen to the two girls by the window. What language ?
were they speaking
are they speaking
did they speak
10．For days, smog persisted in many areas. China is to control air pollution.
take measures
doing business
taking measures
11．If he persists awkward questions, then send him to the boss.
in asking
to ask
to be asked
12．________ is known to the world, Mark Twain is a great American writer.
As
That
Who
13．
二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。
Air pollution
People and air pollution are often in the same places. This means that cities with large populations have the biggest problem of dirty air. Air pollution is caused by many different things. A major kind of air pollution is the gas from cars. Statistics (统计资料) show that 93 percent of all auto trips are within cities.
Another major kind of dirty air is the burning of coal and oil for energy. This energy is needed to make electricity. Of course, much more electricity is used in the city than in the country.
On the average, we throw away more rubbish than the year before. The burning of rubbish makes air pollution even worse. Many major industries are also responsible for the dirty air in the around cities. The fumes (烟) from iron, steel, chemical, and petrol production add particles (微粒) to the air.
The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may kill trees and plants and cause metal to corrode (腐蚀). In some of the larger cities, these fumes endanger the lives of human beings by contributing to lung diseases and causing early death.
The key point of the passage is that 1 .
A．the cause of air pollution is people
B．the causes and the effects of air pollution are both found in cities
C．the effects of air pollution range from headaches to death
2. What is the purpose of this passage? 2
A．to persuade people to stop polluting the air
B．to tell the causes of air pollution
C．to tell why cities are bad places to live
3. Why is air pollution more grave in the city than in the country? 3
A．Because there are larger populations in cities.
B．Because the air in the city is dirty.
C．Because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country.
4. The fumes from coal and oil may cause metal 4 .
A．to corrode B．to twist C．to turn black
5. In larger cities, the fumes from coal and oil may contribute to 5 .
A．heart disease B．loss of clear vision C．lung diseases
(1)
(2)
(3)
(4)
(5)
