Is that your pencil case ____the lost and found case?

 - What do you often do_______ classes to relax yourselves? -We often do eye exercises, listen to music or do some running around the school.

 —Look, an old man is in the middle of the road. It’s too dangerous. —Let’s go and help him go __________the road.

Smoking will_______ your health.

I think you can help ____________ a donation or doing some voluntary work.