Combine the following sentences using appropriate conjunctions.
1. He was tired. He had been working for a long time.
2. You will win the first prize. You have to work hard.
3. He took out his brush. He began to paint.
4. Hurry up. You will be late.
5. She may be poor. She will not take anything that does not belong to her.
6. Something must have fallen. I heard a sound.
7. They must have fallen asleep. There is no light in their room.
8. The......
