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.

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