1. 选择最佳答案。

1. （1） How many museums are there in the US?    
   

   A . Nine． B . Nineteen． C . Ninety．
3. （2） When did the National Air and Space Museum open?   
   

   A . In1976． B . In1986． C . In l996．
5. （3） here are 6,000things such as rockets and      in the museum；
   

   A . planes B . astronaut clothes C . spaceships
7. （4） The museum is open for      hours except 25th December．
   

   A . eight B . seven and a half C . seven
9. （5） You can get more information by      ．
   

   A . writing letters B . sending emails C . making a phone call