用所给词的适当形式填空。

1. His father worked for thirty hours without _____(stop) .

2. It was a temporary _____ (peaceful),and an other war soon broke out.

3. Lei Feng is well-known for _____ (help) other people.

4. His grandmother _____ (bury) in his home-town, Shandong Province.

5. The doctors decided to _____ (operation)on his mother at once.