1. Sarah was hard at it on her computer.

2. Whatever you do, work hard at it and don't try to dodge the column.

3. That's what I like to see - everybody hard at it!

4. When I left they were all still hard at it .

5. Every evening after school and at weekends she's hard at it doing research.

6. He pulled hard at it until he was pleased with it.

7. I studied art and worked hard at it.

8. You must have worked very hard at it.

9. Some people dream of success while others wake up and work hard at it.

9. try its best to gather and make good sentences.

10. Cook was making fresh cornbread rolls for breakfast and lesser mortals were hard at it with brooms and mops.

11. Thacker had set him a spot of overtime and he was hard at it in the mill.

12. We're all ripping each other to pieces here Voice over Back in the tasting room they were still hard at it.

13. It is a demanding role and she needs to work hard at it.