Milan, the second largest city of Italy, has won an undesirable world record. Of the 54 big cities studied by the World Health Organization and the United Nations, Milan is considered to have the worst air pollution. According to these two10-year studies, the level of air pollution in Milan is twice as high as the levels in Paris and Beijing and three times those in Tokyo and London, and four times that in New York. The reason for Milan's bad pollution, to some experts, is that the city lies in a valley that holds back the poisonous gases. Though Milan has taken some measures to lower the level of pollution, the situation is still worrying. People joke to each other, "If you are traveling to Milan, be sure to bring your gas mask." In order to reduce the use of private cars, in 1979, the government in Milan began an interesting experiment: passengers in the city buses did not have to pay for their tickets.
【小题1】Which of the following statements is NOT mentioned in the text?

The earth is the only planet that scientists are certain has life .What does the earth have that the other planets don’t ? For one thing , the earth has just the right temperature . As the third planet from the sun , the earth seems to be just the right distance away . The planets that are closer to the sun are so hot that their surfaces bake in the sun . The farthest planets are cold balls .
When the earth developed— which scientists believe may have happened about billions of years ago , many gases covered the earth . The gases caused the earth to be hot . But something wonderful happened . The temperature was just right for thick clouds to form . It rained very hard for a very long time . This gave the earth its oceans . Water made it possible for plants to grow . The plants created oxygen in the atmosphere . Oxygen is the gas that humans and animals breathe .
Only one other planet in the solar system seems to be something like the earth . That planet is Mars . Mars is smaller than the earth , and it is quite a bit cooler . But it is not too cold for humans . On some days , the temperatures are as cold as a winter day in the northern United States . If you wore a special spacesuit , you could walk around on Mars . You would have to bring your own air to breathe , though . The air on Mars is too thin to breathe . Mars has the largest volcano in the solar system . It is sixteen miles high . The highest volcano on the earth is five miles high . The most unexpected sight on Mars is dried-up river beds . Scientists believe that Mars was once much wetter that it is now . Does this mean there could have been living things on Mars ? Scientists are not sure , but there has been no sign so far .
【小题1】It is the       on the earth that makes life possible .

To be honest, no speech ________ so far has had the same effect on me as this one.

A.has been made     B. being made     C. made    D. to be made

Milan, the second largest city of Italy, has won an undesirable world record. Of the 54 big cities studied by the World Health Organization and the United Nations, Milan is considered to have the worst air pollution. According to these two10-year studies, the level of air pollution in Milan is twice as high as the levels in Paris and Beijing and three times those in Tokyo and London, and four times that in New York. The reason for Milan's bad pollution, to some experts, is that the city lies in a valley that holds back the poisonous gases. Though Milan has taken some measures to lower the level of pollution, the situation is still worrying. People joke to each other, "If you are traveling to Milan, be sure to bring your gas mask." In order to reduce the use of private cars, in 1979, the government in Milan began an interesting experiment: passengers in the city buses did not have to pay for their tickets.

Which of the following statements is NOT mentioned in the text?

A. Milan's air is considered to be worst polluted in Europe.

B. Experts think that the air in Milan is badly polluted.

C. The reason for the air pollution in Milan.

D. Measures have been taken by Milan to reduce the air pollution.

Which of the following cities keeps the lowest level of air pollution?

A. London.                         B. Tokyo.          

C. New York.                        D. Paris.

Why is the air pollution in Milan so serious?

A. Because too many cars are being driven in the city every day.

B. Because the city lies in a place where there are some mountains near it.

C. Because Milan has taken some measures to encourage people to buy private cars.

D. Because the city lies in a place where it is difficult for polluted air to move away.

According to the text, which of the following is TRUE?

A. Milan has taken some measures and the air pollution is being reduced.

B. Milan has taken some action, but the air pollution is still troublesome.

C. Milan has made no effort so far to lower the level of pollution.

D. Milan will taken every step to reduce the air pollution

No government so far has been able to    the number of jobs available with the number of people out of work.

A. provide               B. weigh         C. multiply        D. balance