阅读短文，并填入适当的词。（首字母已给出）

    What must you do when you get a present for your birthday? You have to sit down and

write a thank-you note. The word "thanks" is very i______ (1). We have to use them very

often. We say them when someone gives us drink, helps us to pick up things, hands us a

letter or lends us a book. It is rude(粗鲁) to ask someone to do something w______ (2)

saying "please". We have to use it when we ask for s_____ (3), too.

    We have to learn to say "sorry", too. When we have h______ (4) someone, we'll have

to go up and say we're sorry. When we have forgotten something, we will say "sorry". We

can make people forget w______ (5) by saying it.