1. 用括号内所给词的适当形式填空

1. （1） Oh, I think you have put too much salt in the soup. It tastes quite (salt).

3. （2） The (leaf) on the tree fall in autumn.

5. （3） —What's this in English?
   

   —It's a (fly) disk.
   

7. （4） Who do you think is the most famous (invent) in the world?

9. （5） The customer thought the (potato) weren't thin enough.