1. 用所给词的适当形式填空

1. （1） Mr Wang is one of(popular) teachers in our school.

3. （2） There are some(photo) on the wall.

5. （3） What do you think is the most useful(invent)?

7. （4） I have a pen friend(name) Jane.

9. （5） We're trying our best(save) the endangered animals.