1. I tried to keep a straight face but failed and laughed loudly.
2. if a teacher works with small children, she should have a bag of tricks to keep them busy.
3. Keep your fingers crossed for me, will you?
4. You promised, now try to keep your word.
5. She keeps me company quite often.
6. Don't make mistakes, I am keeping an eye on you!
7. Yesterday I was very tired, I had to _keep an eye on my nephew all day.
8. It is very important to keep an eye on your children's marks.