______ when to leave, I could only stay at home, _____ nothing.
| A．Knowing not; done | B．Not having known; doing |
| C．Having not known; done | D．Not knowing; doing |
．--- Shall I give you a ride as it is so late?
--- Thank you.____________.
| A．If you insist | B．It’s up to you |
| C．It all depends | D．It couldn’t be better |
__________and the problem could be settled.
| A．A bit more effort | B．To make more effort |
| C．Making more effort | D．If you make more effort |
．--- Do you mind my smoking here?
--- ________. Look at the sign! It says, “No smoking”!
| A．Never mind. | B．Of course not |
| C．You’d better not. | D．No, I don’t |
--- I called you last night, but nobody answered.
--- Oh, I usually__________off my cell phone by 8:00 pm.
| A．switched | B．have switched | C．switch | D．had switched |
．--- Jack is really a brave guy.
--- So he is. And we can’t admire his courage ____________.
| A．too much | B．a lot | C．very much | D．a little |