—I left my keys in my office. Could you help me ___        them?—OK．I’ll do it at once．

I’m surprised _______ my old friends in the street.

We have 3 rooms ____________ , but I can’t decide ____________ . 

— Thank you for ______ me _______ the housework. —My pleasure.

The 6-year-old child is old enough_______ himself.