小医生，下列各句均有一处错误，请找出并改正。

   1. We hear the twins are going to buy a present to their parents.  

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   2. You are the best teacher of all. Thank you to teach us so well.

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   3.people never use Mr, Mrs or Miss front their first names.

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   4.-Would you like to go swimming this Sunday?

     -What a good idea! I'm glad.

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   5.Next class we won't talk to anything about England.

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