I still don't have a present for Lucy. I think I (buy) ____ her a CD.

If you don't leave, I (call) ____ the police.

These shoes are very dirty. I (clean) ____ them.

I am quite cold. I (close) ____ the window.

These exercises are very difficult. If you want I (explain) ____ them to you.

It is getting late. I think I (go) ____ home.

Hold on! I (help) ____ you with these heavy bags.

As soon as I arrive, I (send) ____ you a postcard.

I'm sorry I must leave today. No problem. I (take) ____ you to the airport.

If she helps you with your homework, I (tell) ____ the teacher.