根据汉语提示，写出句中所缺的单词。

1. Why not consider _____ (参观) the museum? There are a lot of things to see.

2. The sick woman needed an _____ (手术) on time.

3. They hope to set up an organization to help _____ (残疾的) people.

4. China and India are both _____ (发展中的) countries.

5. He rote a lot about his _____ (经历) as a country teacher.