Car
　　Wherever one lives-in the city or in the country, there are some good reasons for owning a car. First, cars have become an important part of life in many countries. The car provides the most convenient form of transportation. With a car, a person can get around freely, without spending a lot of time. Second, a car is a comfortable way to travel, especially in the winter time. A driver stays warm and dry even in the cold, rainy weather. Finally, a driver is usually safe in his car when he is out at night.
　　There are, on the other hand, many good reasons against owning a car. For one thing, it can be very expensive to purchase and run a car. The gas shortage has caused a big problem for drivers, and the price of fuel continues to go up each year. In addition, it costs a great deal to maintain, repair and insure a car. For another, owning a car can aim cause worry and stress. It is exhausting to drive a car in heavy traffic. It often happens that a driver can be held up on his way because of a traffic jam. What is worse, cars are responsible for most of the smog in cities, which pollutes the environment seriously.
In spite of all the above-mentioned, I still favor owning a car. The reason is that the car gives a person the freedom to schedule his own time. Though we are confronted with a problem of energy crisis, I am sure that the real solution will have to be a new kind of car, one that uses cheap, efficient fuel and does not contaminate the air.

范文：
1. 别人请帮助时，在什么情况下我们会说"不"。
2. 为什么有些人在该说"不"的时候不说"不"。
3. 该说"不"时不说"不"的坏处。
Don`t Hesitate to Say No