根据句意和所给的首字母提示，补全句子中的单词。

1. His p _________wag to graduate from medical school and become a great doctor.

2. Uncle Bill does well in taking photos.He is a good p__________.

3. If you find someone smoking at school,you should r __________ it to your teacher right away.

4. The famous singer is a __________on CCTV next month.

5. Can you i _________what the life without light would be like?