In 1620,about half the USA was covered by forests .Today the forests have almost gone .A lot of good land has gone with them ,leaving only sand .China doesn’t want to copy the USA’s example.We’re planting more and more tress .We’ve built the “Great Green Wall ”of tress across northern pat of our country .The “Great Green Wall”is 7,000 kilometers long ,and between 400 and 1,700 kilometers wide .It will stop the wind from blowing the earth away .It will stop the sand from moving towards the rich farmland in the south .More “Great Green Wall ”are needed .Trees must be grown all over the world. “Great Green Wall ”will make the world better .

根据短文内容，选择正确答案。

1.In 1620 ,about_____ the USA was covered by forests

2. A lot of good land has gone with _____.

3. The “Great Green Wall”In China is _____long

4. Trees must be grown in _____.

5._____ will make the world better .

In 1620, about half the U.S.A. was covered by forests. Today the forests have almost gone. A lot of good land has gone with them, leaving only sand. China doesn’t want to copy the U.S.A.’s example. We’re planting more and more trees. We’ve built the “Great Green Wall” of trees across northern part of our country. The Great Green Wall is 7,000 kilometers long, and between 400 and 1,700 kilometers wide. It will stop the wind from blowing the earth away. It will stop the sand from moving towards the rich farmland in the south. More “Great Green Walls” are needed. Trees must be grown all over the world. Great Green Walls will make the world better.

1. In 1620, about ______ the USA was covered by forests.

2. A lot of good land has gone with ______.

3. The Great Green Wall in China is ______ long.

4. Trees must be grown in ______.

5. ______ will make the world better.

BEIJIN—No Car Day was first started by 34 cities in France on September 22,1998.It was started to protect the environment, By now, more than 1,000 cities around the world have had a No Car Day.

         The first No Car Day in China was in Chengdu in 2001.Other cities ,including Taipei, Shanghai and Wuhua, also support the day.

    In Beijing, more and more people are joining in the activity. It asks the drivers to leave their cars at home for one day each month and walk or ride a bike to work. It also calls on Beijingers not to use cars on June 5(World Environment Day).The slogan(口号) for the day is, “If we drive for one less day, we can have one more nice day.”

    So far, more than 200,000 drivers have shown their support. “We can’t control the weather, but we can choose not to drive.’’ said, Wu Zonghua, a car club chairman. Beijing is trying to have 238 blue sky days this year. In the first quarter of this year, Beijing only had 52 blue sky days. This was 11 days less than the number for the same period last year. Much of the dust comes from the desert, but cars cause most of the air pollution. We must do more for No Car Day.

1.There are         cities in China that support No Car Day according to the passage.

        A. three             B. four              C. five                D. six

2.The activity of No Car Day encourages Beijing drivers          .

                   A. not to work on No Car Day          

B. to enjoy having a day off

        C. to leave their cars at home for repair

        D. to ride a bike or walk instead of driving to work

3. According to the passage there were          blue sky days in the first quarter of last year in Beijing.

                   A. 52                  B. 63                  C. 41                  D. 238

4.The air pollution in Beijing is mostly caused by          .

            A. cars                 B. dust               C. weather       D. rubbish

5.We can know from the passage that          .

            A. more and more people in Beijing are joining car clubs

       B. people will have one more World Environment Day each month

       C. more and more people won’t drive on Nor Car Day in Beijing

       D. more people in the world won’t drive any more