We can benefit much from making our cities greener by planting trees. First, trees absorb carbon dioxide to produce oxygen which is essential to the health of human beings. Second, trees and other greenery make our cities more beautiful. Third, trees can also improve the climate of the cities.
　　Since we can get so much from making our cities greener, we should spare no effort to do that. We should plant more trees and take better care of them. We also should not cut down the trees. In a word, we should do everything to add to the greening of our cities.

1991年1月四级作文题及范文
　 Directions:  For this part, you are allowed 30 minutes to write a composition about What Would Happen If There Were No Power in three paragraphs. You are given the first sentence or part of the first sentence of each paragraph. Your part of the composition should be no less than 100 words, not including the words given. Remember to write clearly. You should write this composition on the Composition Sheet.
　An  Important Means of Transport In  China.  You should based your composition on the/bllowing utline:
1．为什么自行车在中国这样普及。
2．和汽车比较。
3．自行车在中国的前途。

范文：
   The bicycle is the most common means of transport in our country. There are several reasons for that. First, most people are not rich enough to buy a car. Since the bicycle is not expensive, it is affordable by the average Chinese families. Second, China has a large population and the traffic is heavy. The bicycle has the advantage of being small in size. A road which can only allow two cars to pass may allow more than ten bicycles to run side by side. Finally, people enjoy riding a bicycle to school, to work and on outing. It is so pleasant and the exercise is good for people’s health.

      Compared with a car, a bicycle has its disadvantages and advantages. For instance, a bicycle is not fit for a long distance trip. A person who sits all day long in a car might get fat and unhealthy, while a person on a bicycle may gain good health and pleasure.
      The bicycle is popular in China and it will remain so for a long time to come. Many things must change before cars became common in China. Therefore, in the foreseeable future, the bicycle will still be welcome.

1991年6月四级作文题及范文
Directions:  For this part, you are allowed 30 minutes to write a composition of no less than 100 words on Changes in People's Diet. Study the following table carefully and your composition must be based on the information given in the table. Write three paragraphs to:
1, state the changes in people's diet (饮食) in the past five years;
2, give possible reasons for the changes
3, draw your own conclusions.
4, you should quote as few figures as possible.
 

范文：
　　From the chart we can see that during the past five years there have been great changes in people’s diet. The greatest change occurs in grain consumption, which has dropped 4% from 49% in 1986 to 45% in 1990 in total food consumption. The second greatest change is in milk consumption, which increased from 10% in 1986 to 13% in 1990. But on the other hand, two trends can be observed in the consumption of meat and fruit and vegetables. From 1986 to 1989, meat consumption increased from 17% to 23% while that of fruit and vegetables dropped from 24% to 20%. From 1989 to 1990, meat consumption dropped a little to 21%, while that of fruit and vegetables increased a little to 21%.