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 manager of the local 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 your father is a steel worker, a tuck driver, a doctor, or a grocer, he is producing goods or services 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 seem to be something abstract, but for each person or businessman who is marketing and selling something, it's very real . If nobody buys your tomatoes, it won't be long before you get the message. The market is telling you something. It's telling you that you are using energies and resources in doing something that that the market doesn't want you to do.

单选题 According to the passage, you are buying from the market if you______ .

单选题 If you are producing for a market, you must .

单选题 According to the passage, which of the following is NOT true______

单选题 In what way is the market very real for any one or business who is making and selling some-thing? ______

单选题 Which of the following would be the best title for the passage? ______