—Sorry, do you mind if I smoke here?
—Yes,
| A．you could | B．go ahead | C．I do | D．my pleasure |
Since the sales promotion, all the items _______well.
| A．have been sold | B．were sold | C．had sold | D．have been selling |
The waste water, when _______，should be clean enough to meet standards.
| A．releasing | B．being released | C．released | D．to be released |
As for me, few excitements can beat ______of being admitted to my favorite university.
| A．that | B．those | C．one | D．ones |
--What a beautiful dress Jane is wearing！
--But it doesn't look good ____ her skin.
| A．on | B．in | C．against | D．alongside |
Under no circumstances _______the search far the missing plane.
| A．do we stop | B．will we stop | C．we stop | D．we will stop |