Why do you collect so many old bikes?—I’Il have them _ and give away to the children who don’t have bikes.

Our school covers the Outstanding Student Award ___________ after each exam.

I’d appreciate ____ if you would like to teach me how to use blog and twitter on the Internet.

How will you feel when ____?

Smoking is not allowed in our school, so it may be a good chance for our math teacher to_______ smoking.