21. —Shall I give you a hand with this as you are so busy now?
—Thank you. ______.
A. It couldn’t be better B. Of course you can
C. If you like D. It’s up to you
22. — Excuse me. I want to buy some stamps, but I can’t find a post office.
— I know ______ nearby. Come on, I’ll show you.
A. one B. it C. that D. any
