根据内容,填所缺单词（10个）What must you do when you receive a present f

根据内容,填所缺单词（10个）
What must you do when you receive a present for your birthday?You have to sit down and ______ a thank-you note.The _______ "thank you" are very important.We have to use them very often.We say them when someone gives us a drink,_______ us to pick up things,hands us a letter or lends us a book.
________ important word is "please".Many people forget to use it.It is _______ polite to ask someone to do someting without saying "please".We have to use it when we ask for someting,too.It may be a book or a pencil,more rice or help.We have to use "please"to make request（请求）pleasing.
We have to _______ to say "sorry",too.When we have hurt someone,we'll have to go up and say "We're sorry".When we have forgotten someting,we will ______ say "sorry".We can make people forget wrongs by _____ it.
These three words are simple _______ important.Our children must learn to use them.They are pleasing words to use in ________language.