6．A．The seasons of America．    B．Tile weather of America

   C．The American people．

4．A．Five minutes walk．            B．Five―minute’s walk

   C．Five minutes’ walk．

3．A．In the office．                     B．In the shop．

   C．In the post office．

2．A．Look at the other people，           B．Make sure if the street is clear.

   C．Make sure if the weather is fine．

1．A．I like it very much；            B．It’s very interesting

   C．It tells something about the moon．