阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
Nowadays, more and more people have chances to travel, study, work or even live abroad. It is necessary for you to keep in mind these general 10 (rule) for polite behaviour.
If you 11 (invite)to an American friend’s home for dinner, first of all, arrive on time(but not early). When you’re invited to someone’s home for a meal, 12 is polite to bring a small gift. Flowers or candies are always appropriate. If you have an attractive item 13 (make)in your native country, your host or hostess would certainly enjoy receiving that as a gift.
14 (wear) proper clothes and a beautiful smile is simply not enough. Table manners are also of great 15 (important). Do not open your mouth to talk, unless you have swallowed your food. Also chew food with your mouth 16 (close). When you want to get the food that is at a distance, do not stretch your hands to reach 17 it. Instead, ask for the food to be passed to you.
Don’t leave 18 (immediate ) after dinner, but don't overstay your welcome, either. When your friends seem to be getting tired and running out of conversation, take their behaviour as a signal to leave. The next day, call or write 19 thank-you note to say how much you enjoyed the evening.