1. I can't concentrate on my work.
2. Could you just concentrate on the job in hand?
3. Just try to concentrate on hitting the ball.
4. You should concentrate on your study.
5. I couldn't concentrate on my work - my mind was on other things.
6. Your essays tend to concentrate on one theme to the exclusion of everything else.
7. Concentrate on your work.
8. They will concentrate on teaching the basics of reading, writing and arithmetic.
9. It was up to him to concentrate on his studies and make something of himself.
10. The group plans to concentrate on six core businesses.
11. I wish you'd concentrate on what I'm saying.
12. Be quiet - let me concentrate on my homework.
13. You should concentrate on the road when you're driving.
14. A driver should concentrate on the road when driving.
14. Sentencedict.com is a online sentence dictionary, on which you can find nice sentences for a large number of words.
15. I am leaving to concentrate on writing fiction.
16. UK banks tend to concentrate on short-term lending.
17. At this age we concentrate on the children's reading and writing skills.
18. He found it hard to concentrate on conversation so far removed from his present preoccupations.
19. I can't concentrate on my work with all that noise.
20. Let's concentrate on the matter in hand for now, and leave other issues till later.
21. Having failed my French exams, I decided to concentrate on science subjects.
22. We need to concentrate on the matter in hand .
23. We need to concentrate on our target audience(sentencedict.com), namely women aged between 20 and 30.
24. He was shattered and too tired to concentrate on schoolwork.
25. He is leaving the band to concentrate on his writing.
26. I'm going to concentrate on my writing for a while.
27. Be thankful for what you have; you'll end up having more. If you concentrate on what you don't have, you will never, ever have enough. Oprah Winfrey 
28. Why can't they just leave well alone and let us concentrate on teaching?
29. They have narrowed the focus of the investigation, to concentrate on younger adults.
30. His decision to resign was disappointing, but it's no use crying over spilt milk. We need to concentrate on finding someone to replace him.
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