根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词。
Dear Peter,
I’m glad to receive your letter. Thank you for your caring for the weather and my health. Now I’d like to tell you something a_____【小题1】____ the smog（雾霾）.
Since the winter last year, the smog has t_____【小题2】_____ place for several times. It has done great harm to our d_____【小题3】_____ life. Many traffic accidents happened just because of the heavy smog weather. More and more people have to go to see the d____【小题4】___ because of the serious disease caused by the smog. Quite a lot of flights have to be put off. A great number of people have to stay at h_____【小题5】____ for fear of the poisonous air caused by the smog.
People have realized the great harm caused by the smog and the importance of p____【小题6】______ the environment. People from all over the country are taking actions to reduce the smog weather. The g_____【小题7】_____ asks people to go to work or school with the public traffic, such as the bus and the u_____【小题8】_____. Also we should plant more trees.
According to me, I will go to school by bike or on foot, and I won’t throw the waste a___【小题9】____. In addition, I will tell the people that all of us should try our best to protect the environment. Would you like to tell me some good ideas? I’m looking f____【小题10】___ to your reply.
Yours,
Wang Hua

We should plant more trees to make our city         .

We should plant more trees on  ____ sides of the street.

A. either   B. both        C. all      D. each

根据短文内容及首字母提示，填写所缺单词，使短文意思完整。每空限一词。

Dear Peter,

I’m glad to receive your letter. Thank you for your caring for the weather and my health. Now I’d like to tell you something a_____1.____ the smog（雾霾）.

Since the winter last year, the smog has t_____2._____ place for several times. It has done great harm to our d_____3._____ life. Many traffic accidents happened just because of the heavy smog weather. More and more people have to go to see the d____4.___ because of the serious disease caused by the smog. Quite a lot of flights have to be put off. A great number of people have to stay at h_____5.____ for fear of the poisonous air caused by the smog.

People have realized the great harm caused by the smog and the importance of p____6.______ the environment. People from all over the country are taking actions to reduce the smog weather. The g_____7._____ asks people to go to work or school with the public traffic, such as the bus and the u_____8._____. Also we should plant more trees.

According to me, I will go to school by bike or on foot, and I won’t throw the waste a___9.____. In addition, I will tell the people that all of us should try our best to protect the environment. Would you like to tell me some good ideas? I’m looking f____10.___ to your reply.

Yours,

Wang Hua

For many years scientists have said that the earth is getting warmer. Now they have found something new-hot cities! In the southern US, they have found that cities become very hot in summer. For example, the city of Atlanta in Georgia has roof(屋顶) temperature of up to 50^oC while it is 27℃ in the streets! At night, the outside of buildings stays so hot that the heat of the city causes storms over the city!
China also has the same kind of problems. Every year more farmland is used for factories or offices. More housing is needed, too. As people become richer, they buy more cars. New roads are needed and new car parks are built in the city centers. This all makes cities hotter.
It isn’t easy to change the situation. City planners say that we should plant more trees in the middle of cities. Every new street should have trees on both sides, they say. Trees make the temperature lower, so we should have more trees in our parks and squares. We should also paint our roofs white. If we do this, they do not become so hot. Every roof in a hot and sunny country should have solar(太阳的) roof panels. The electricity from these can be used to run the air conditioners (空调)in the buildings.
People continue to cut down forests around the cities. This makes the problem worse. Cities are growing faster and faster. By the year 2025, four fifths(五分之四) of the population will be living in cities. If we go on like this, there will not be enough farmland to feed everyone in the world
【小题1】The scientists have found       .