根据句意及汉语提示完成下列句子

1. There are many old things in the history _____ (博物馆).

2. We are studying for an English _____ (考试) now. 

3. They went to _____ (夏令营)last summer

4. Did you go to _____ (中央公园)?

5. He is our _____ (向导). He helped us a lot.