The favorite food in the United States is the hamburger, a kind of round sandwich of cooked beef.____At fast food restaurants, people order their food, wait a few minutes, and carry it to their tables themselves. People also take their food out of the restaurant and eat it in their cars or in their homes. At some fast food restaurants, people can order their food, pay for it and pick it up without leaving their cars.

    ____Most of them sell hamburgers, French fries and milkshakes, which are traditionally popular foods among Americans. In addition, there are many fast food restaurants that serve Chinese food, Mexican food, Italian food, chicken, seafood and ice cream.

    The idea of a fast food restaurant is so popular that nearly every kind of food can be found in one. Fast food restaurants are popular. ____

    First, they are not formal restaurants. Customers wear any type of dress when they go to a fast food place.____ People who are busy do not want to spend time preparing their own food or waiting while someone else prepares it. In fast food restaurants the food is usually ready before the customer even orders it. Finally, most food in a fast food restaurant is not expensive. ____ However, they may not be able to afford a more traditional and more expensive restaurant very often.

A. Second, they are fast.

B. Chinese diets are also welcome.

C. In fact, they reflect American life style.

D. They will go to a good restaurant for important guests.

E. The favorite place to but a hamburger is a fast food restaurant.

F. Therefore, people can afford to eat at a fast food restaurant often.

G. There are many kinds of fast food restaurants in the United States.

    I grew up poor. We had little money, but plenty of love and attention. I understood that no matter how poor a person was, he could still afford a dream. My dream was athletics.

    By the time I was sixteen, I was good at baseball and football. My high-school coach was Ollie Jarvis. He not only believed in me, but taught me the difference between having a dream and showing conviction(信念).

    One summer a friend recommended me for a summer job. This meant a chance for money in my pocket — cash for dates with girls, certainly, money for a new bike and new clothes, and the start of savings for a house for my mother.

    Then I realized I would have to give up summer baseball to handle the work schedule, and that meant I would have to tell Coach Jarvis I wouldn't be playing. I was dreading(害怕) this, but my mother said, “If you make your bed, you have to lie in it.”

    When I told Coach Jarvis, he was as mad as I expected him to be. “Your playing days are limited. You can't afford to waste them,” he said.

    I stood before him with my head hanging, trying to think of the words that would explain to him why I dreamed of buying my mom a house.

    “How much are you going to make at this job, son?” he demanded.

    “Three twenty-five an hour,” I replied.

    “Well,” he asked, “is $3.25 an hour the price of a dream?”

    That question laid bare for me the difference between wanting something right now and having a goal. I devoted myself to sports that summer, and within the year I was drafted by the Pittsburgh Pirates to play rookie-league ball, and offered a $20,000 contract. I signed with the Denver Broncos in 1984 for $1.7 million, and bought my mother the house of my dream.

如图，在平面直角坐标系xOy中，△OAB的顶点A在x轴正半轴上，OC是△OAB的中线，点B，C在反比例函数$y=\frac{3}{x}$（x＞0）的图象上，则△OAB的面积等于____ ．