摘要：15．--Mum.could you buy me a new bike like this?--Sure.we can buy one than this.but this．A．a better.better than B．a worse.as good asC．a cheaper.as good as D．a more expensive.thanDo you get presents from your friends? What should you do when you get a present 1 your birthday? You have to sit down and 2 a thank--you note．The words “thank you are very 3 ．We have to use them very often．We say them when someone gives us a drink. 4 us pick up things or gives us a gilt．Another important word is “please ．Many people often 5 to use it．It is rude to ask someone to do something without saying “please ．We have to use it when we 6 something.too．It may be a book.a pencil.more rice or help．We should learn to 7 “sorry .too．When we have 8 someone.we should say we are sorry．When we have 9 to do something.we will also have to say “sorry ．These three expressions are 10 ．We should learn to use them more often．

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