阅读理解。

     If you go out, you can find cars here and there. Bad smoke from a car can get into the air. This bad

smoke is called pollution.

     Pollution turns the air a gray color. It is very dirty. It also makes the air around us get worse and worse.

It is not good for our health.

    To keep pollution down, the States test cars every two years. This test checks to make sure the cars do

not pollute the air. If a car doesn't pass the test, the owner can't drive it the next year.

     Some car owners drive their cars even though they can't pass the test. It is also very bad for the air.

     People want to find a way to get these cars off the road. So a state program was started. Now it seems

to be helping. In the state program, the States buy cars that can't pass the test or will help pay for repairs.

This program has been helping people buy better cars or fix their old ones. And the air is becoming better

and better.

     The state program that takes pollution cars off the road has just finished its first year, and people say

it has been successful. For the past year, the state program has been buying cars that can't pass the test,

and the cars bought by the States through the program are put out of use.

1. ______ is called pollution.

A. The car

B. A gray color

C. The smoke from cars

D. The test

2. The cars are tested every two years to make sure ______.

A. people can visit the old cars

B. the owners don't drive any more

C. the owners can buy new cars

D. they don't pollute the air

3. In order to ______, the States buy cars that can't pass the test or will help pay for repairs.

A. get money from car owners

B. cut down the pollution

C. make the air around us worse

D. sell more new cars