阅读下面的短文，从所给的A-F六个选项中，选出正确的选项填空，使短文意思完整。并在答题卡上将该编号字母涂黑。
American people like to say " Thank you "    . People of many other countries do, too. It's a very good habit.
  when someone passes something to you, when someone opens the door for you, When someone says you have done your work well or when someone has bought you a nice thing or say your city is very beautiful,    . but also between parents and children, brothers and sisters, wives and husbands. ________ . When you hear someone say so behind you, you know he or she wants to walk past you without touching you .It is not polite to interrupt(打扰) others when they're talking.___ _____, say " Excuse me " first, and then begin. You should also do so when you want to cough or make any noise before others.

A．" Excuse me " is another useful short sentence

B．You should say “Thank you "

C．When others help them or say something kind to you

D．You should say " I'm sorry "

E. If you want to speak to one of them
F. “Thank you " is not only used between friends