In the U S, people like waiting for a table than sitting with people they don't know. This

means a hostess may not seat a small group even if a large one is available. If you are sitting at a table with people you don't know, it is impolite to light up a cigarette without asking first if it will disturb them.

At American restaurants and coffee shops, you are usually served tap water before you order. You may find the bread and butter is free and if you order coffee, you may get a free refill (免费再加).

Most cities and towns have no rules about opening and business times for stores or restaurants, though they usually do make rules for bars. In large cities, especially, stores may be open 24 hours a day.

Servings (上的饭菜量) in restaurants are often large, too large for many people. If you can't finish your meal but would like to enjoy the food later, ask your waitress or waiter for a "doggie bag" (“狗食袋”，即打包袋儿). It may have a picture of a dog on it, but everybody knows you're taking the food for yourself,

Supper and dinner are both words for the evening meal. Some people have "Sunday dinner". This is an especially big noon meal.

Tips are not usually added to the cheek. They are not included in the price of the meal. A tip of about 15% is often expected and you should leave it on the table when you leave. In some restaurants, a check is brought on a plate and you put your money there. Then the waiter or waitress brings you your change.

Which statement is true？

A．American people like sitting with people they don't know.

B．Hostess always seat a small group at a large table.

C．American people never sit with people they don't know.

D．American people would not light a cigarette if the people who sit at the same table mind their smoking.