国家开放大学-理工英语1

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单元自测6    试题及答案

题目为随机，用查找功能(Ctrl＋F)搜索题目

[题目]—___________________________________.

—  Oh, no, Frankly speaking, I seldom do online shopping.

[题目]I’m ________a business trip for APEC summit, sir.

[题目]________ is known to the world, Mark Twain is a great American writer.

[题目]—___________________________________.

—  I mean the best way is using your own mobile phone or computer to operate it.

[题目]— A： ________are the most popular things people buy online？

— B： Definitely, clothes.

[题目]—  We have to stay at home for a whole day. Why not go out and have a walk？

—  ______________.

[题目]— Susan ,what do you think of my plan？

—  ______________.

[题目]Cleaner heating system will _______in Beijing to control air pollution.

[题目]For days, smog persisted in many areas. China is _______to control air pollution.

[题目]Have you filled in the application form ________ your passport yet？

[题目]I suppose you know everything about that event, ________ ？

[题目]If he persists________

[题目]Listen to the two girls by the window. What language________？ 

[题目]Miss Liu doesn't mind _______ your homework as long as it is done by yourself.

[题目]There is no doubt __________Herbert is the most industrious student in our class.

二、阅读理解：阅读下面的短文，根据文章内容和所给信息将短文补充完整

A THANK-YOU LETTER

Dear Professor Smith,

Many thanks for your _____ (友好和热情)during _____  (我方代表团)recent visit to your university. 

It was nice of you to introduce us to some famous professors and celebrated scholars at your university. We had a safe and sound trip home.

Now we _____  (重返工作岗位)our work. 

Again, _____   (代表)the group, I would like to _____ (对你和你的团队表示感谢). Meanwhile, I hope you will someday pay a visit to our university and give us more talks on Modern Western Economics.

Sincerely yours,

Tony Wang

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.

1. The key point of the passage is that_________.

2. What is the purpose of this passage？

3. Why is air pollution more grave in the city than in the country？

4. The fumes from coal and oil may cause metal_________.

5. In larger cities, the fumes from coal and oil may contribute to _________.

二、阅读理解：阅读下面短文，选择合适的内容将短文补充完整。

A. to cook or heat your home

B. checked regularly

C. to reduce air pollution

D. Use less electricity

E. Raising any sort of livestock

Man-made air pollution mainly comes from two sources： mobile ones and stationary ones. Mobile sources are cars, planes, boats, etc. Stationary sources include large factories, power plants and every household, which burns natural gas or wood. The most important ways _____  are to drive less, use less electricity and natural gas, and eat vegetarian.

THESE IDEAS ARE EASY TO FOLLOW：

1. Get your car _____  to make sure everything works properly. Whenever possible, walk, cycle, carpool, or use public transportation. Buy fuel-efficient vehicles. Drive at 60 mph or less to improve gas mileage.

2. Burn less natural gas _____  Instead, use a solar cooker or heater and wear extra layers.

3. Become a vegetarian or a vegan. _____  requires more land and emits more carbon dioxide than simply growing crops directly for human food.

4. _____  Coal power plants produce most of the world’s electricity, and they also produce more carbon dioxide than any other source. Coal plants also release many other pollutants. Unplug televisions, cell phone chargers, and other appliances while not in use. Most devices continue to use small amounts of power even when they’re turned off. Avoid using air conditioning, and don’t leave the fridge open any longer than necessary. Only run the clothes washer or dish washer when full. Rather than using a dryer, hang clothes on a line to dry in the sun.