When you're invited to have dinner at a foreigner's home, please remember the followings.

      At the table, when the hostess(女主人) picks up her napkin, you may pick up yours and put it on your legs.

      If a servant(佣人) passes food around, he will pass the dish to you at your left hand so that you can easily serve yourself with your right hand. Never serve yourself while the dish is on your right. It is then the turn of your neighbour on the right.

      Do not reach across the table to get something in front of someone. That is not polite. Ask him or her to pass it to you.

      There are things in the middle of the table, such as bread, butter, and candies. You shouldn’t take any until the hostess tells the servant to pass them to you.

      Do not leave your seat without saying anything. If you need to leave the table to go to the washroom or do something else, you should say “Excuse me for a moment, please.”

An important question about eating out is who pays for the meal. If a friend of yours asks you to have lunch with him, you may say something like this, “I'm afraid it'll have to be someplace cheap, as I have very little money.” The other person may say, “OK, I'll meet you at McDonald's.”

    This means that the two agree to go Dutch, that is, each person pays for himself. He may also says, “Oh, no, I want to take you to lunch at Smith's.” This means the person wants to pay for you. If you feel friendly towards this person, you can go with him and you needn't pay for the meal.

    American customs about who pays for dates(约会) are almost the same as in other parts of the world. In the old days, American women wanted men to pay for all the meals. But today, a university girl or a woman in the business world will usually pay her own meal. So as you can see, it is a polite thing to make the question clear at the very beginning.

原料：豆芽(bean sprouts)，盐。

步骤：首先把锅放在火上。然后在锅里倒一些油，油热了之后，放入豆芽、盐，翻炒(stir fry)一两分钟。最后将豆芽盛入盘子里。