1. 选用所给的单词填空。

paintings, exciting, museum, guide, expensive

1. （1） They had fun at the zoo. They had an  day.

3. （2） Last Sunday, the students went to visit the science . They learned a lot.

5. （3） There are so many people in the park. I can't hear the .

7. （4） She went to an art museum yesterday and saw many .

9. （5） The things were so . And I didn't buy anything.