It is very important for us to be polite in this socity.So I think we should learn to say thank you. When we at home,our parents always pass us a cup of milk and wash our dirty clothes.They help us a lot.At these moments,we should say thank you to them.When we at school,our teachers and classmates often encourang us,we should say thank you to them.When we grow up,we may work in a company,when our workmates help us open the door,we should say thank you. In a word,to be polite is important.
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