?????????? Today, the earth's deserts are spreading and getting larger and desertification is a serious problem facing the world. The major reason for this is irresponsible cutting down of trees. As is shown in the first cartoon, when people cut down trees desert forces on and becomes irrepressible.
People cut down trees for various reasons but they may forget that trees play a vital part in water and soil conservation. Trees can preserve moisture and fertility in the soil, protect soil against erosion and prevent fertile land from becoming desert. Therefore when people cut down all of the trees, the earth lies bare and dry in the hot sun, and desert is inevitable.
Desertification can lead to many other serious problems which may threaten the existence of human beings, such as a reduction of arable land, terrible droughts and famine. In order to prevent desertification, people have to plant trees, as the second cartoon shows. The time when people plant trees is the time when desert retreats. People should not cut down trees any more, as is done in the first cartoon, but rather, they should plant more trees, and only in this way can desertification be finally defeated.
P23：范文八
隐形杀手
Directions:
A. Study the following cartoon carefully and write an essay in about 200 words.
B. Your essay must be written clearly on ANSWER SHEET Ⅱ.
C. Your essay should meet the requirements below:
1. Describe the cartoon and the message conveyed
2. Draw a conclusion and give your comment on the cartoon
背诵3Pollution is becoming more and more serious all over the world. As is shown in the cartoon, two cars are giving off waste gas and three people are trying to avoid breathing in the poisonous gas by masking their face with their hands. The poisonous gas sent off by factories, domestic appliances and automobiles has made the air unhealthy for people to breathe.（对图画进行描述）
There is no denying that automobiles are indications of civilization, progress and development; nevertheless, automobiles cause the serious problem of air pollution. Scientists have warned that unless effective measures are taken, the problem of pollution will eventually get out of hand. Actually, people are showing a real concern over the problem. For example, there is an increasingly loud voice from the public（公众） for firm action against pollution from automobiles.（寓意）
Indeed, the earth is our home and we have the duty to take care of it for ourselves and for our descendants. In my opinion, we should work out concrete solutions to the problem of pollution from poisonous gas given off by automobiles. For example, the automobiles should be equipped with a device which can dispose of waste gas so as to prevent it from polluting air. Only in this way can we really solve the problem of air pollution caused by automobiles.（措施、建议）背诵3
P24 范文九
尸销会
Directions:
A. Write an essay that conveys the information in the following chart/graph/picture/drawing/cartoon accompanied by your comments.