American people like to say "Thank you" when others help them or say something kind to them. People of many 1 do so, too. It is a very good habit. You should say "Thank you" when someone 2you the salt on the table, when someone in front of you keeps the door open 3you, when someone says your dress is beautiful,4 when someone says you've done a good job. "Thank you" is used between friends and strangers. It's also used between parents and children,5 and sisters.
"Excuse me" is another short 6they use. When you hear someone say "Excuse me" behind you, you will know somebody wants to walk past you without 7you. It's not 8to interrupt (打断) others when they are talking. If you want to speak to one of them, say "9" first, and then begin talking. You should also do so when you want to 10or make any noise.
Let's learn to say "Thank you" and "Excuse me".
