1. (2017七下·无锡期中) (B)根据句意，在相应的横线上，写出所给单词的适当形式

1. （1） We are happy to celebrate my grandpa's (99) birthday party..  
3. （2） He was very (surprise) to see the lovely cat with three legs.
   
5. （3） You can see beautiful tress and flowers (cross) the bridge.
   
7. （4） The engineer checked the computer (care).