[单项选择]A. You smile politely when you happen to see someone you know.
B. A fake smile never looks quite the same as a real one.
C. Flight attendants may welcome passengers with the same, forged smile.
D. Every human being is born with the ability to smile.

When you enter a supermarket, you see shelves full of food. You walk between the shelves. You carry a shopping basket and put your food in it.
You probably hear soft, slow music as you walk between the shelves. If you hear fast music, you walk quickly. The supermarket plays slow music. You walk slowly and have more time to buy things.
Maybe you go to the meat department first. There is some meat on sale, and you want to find it. The manager of the supermarket knows where the customers enter the meat department. The cheap meat is at the other end of the meat department, away front where the customers enter. You have to walk by all the expensive meat before you find the cheaper meat. Maybe you will buy some of the expensive meat instead of: the meat on sale.
Tile department selling milk and milk products such as butter and milk powder is called the dairy department. Many customers like milk that has only a little butterfat(牛奶中的脂肪) in it. One store has three
A. Buy Me
B. Food on Sale
C. Supermarket
D. Low Fat Milk

When you enter the gate of Disneyland you will see a sign hanging on the wall. There are some regulations you have to obey while enjoying the park:
We request that no food or beverages (饮料) be brought in Disneyland. A picnic area is located west of the main entrance for your convenience. Also, for the comfort of those around you, we request that there be no flash photography, eating or drinking in a pleasure ground. Guests with very young children may take turns enjoying these places.
As long as you follow the rules, you will have a very good time there.

What shouldn’t you do in a pleasure ground
There should be no （　）in a pleasure ground．