题目内容：

The market is a concept. If you are growing tomatoes in your backyard for sale you are producing for the market. You might sell some to your neighbor and some to the local manager of the supermarket. But in either case, you are producing for the market. Your efforts are being directed by the market. If people stop buying tomatoes, you will stop producing them.

If you take care of a sick person to earn money, you are producing for the market. If your father is a steel worker or a truck driver or a doctor or a grocer, he is producing goods or service for the market.

When you spend your income, you are buying things from the market. You may spend money in stores, supermarkets, gas stations and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.

The market may be something abstract (抽象的). But for each person or business that is making and selling something, it is very concrete. If nobody buys your tomatoes, it won’t be long before you get the message. The market is telling you something. It is telling you that you are using energies and resources in doing something the market doesn’t want you to do.

1. Which of the following would be the best title of the passage?

A．Selling and Buying.	B．Everything you do is producing for the market.
C．What is the market?	D．What the market can do for you.

2.All of the following acts are producing for the market except________.

A．working in a bank	B．attending a night school
C．driving a taxi	D．growing beans for sale

3.You are buying from the market when you________.

A．borrow a book from the library	B．drive to the seaside for a holiday
C．look after your children	D．dine at restaurant

4.The word “concrete” in the last paragraph may most probably mean________.

A．serious

B．important

C．necessary

D．real