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　　The Hamburger is a kind of food which is popular in the western countries. The history of the hamburger can be traced back to the 19th century. It is said that the hamburger was first sold in a small restaurant in Hamburg, Germany. However, the hamburger we eat today is much different from the one in the past.

　　Modern hamburgers are made of two pieces of bread with a beef patty between them. Some people like to add cheese, lettuce, and tomato slices to their hamburgers. Hamburgers are not only delicious, but also convenient to eat. They can be found in fast food restaurants, supermarkets, and even schools.

　　However, hamburgers are not healthy food. Eating too many hamburgers can lead to weight gain and other health problems. Therefore, it is important to eat hamburgers in moderation.

　　Questions：

　　1、The hamburger first appeared in _______.

　　A. the United States

　　B. a small restaurant in Germany

　　C. a supermarket

　　D. a school

　　2、Modern hamburgers are usually made of _______.

　　A. beef and cheese

　　B. beef and lettuce

　　C. beef and tomato slices

　　D. bread and a beef patty

　　3、Hamburgers are considered as _______ food.

　　A. healthy

　　B. unhealthy

　　C. convenient

　　D. delicious

　　4、Eating too many hamburgers may cause _______.

　　A. weight loss

　　B. weight gain

　　C. good health

　　D. good taste

　　5、The word “moderation” in the last paragraph means _______.

　　A. quickly

　　B. regularly

　　C. carefully

　　D. in a limited way