Every possible means __________ to prevent the air pollution, but the sky is still not clear.
| A．is used | B．are used |
| C．has been used | D．have been used |
Most nurses are women, but in the higher ranks of the medical profession women are in a ________.
| A．scarcity | B．minority |
| C．minimum | D．shortage |
The interviewee hurried to the meeting room，only ________ that the interview was over.
| A．to tell | B．having been told |
| C．to be told | D．telling |
Please call my secretary to arrange a meeting this afternoon, or ________ it is convenient to you.(2011·江西)
| A．whenever | B．however |
| C．whichever | D．wherever |
—How is your recent trip to Sichuan?
—I've never had ________one before.(2011·四川)
| A．a pleasant | B．a more pleasant |
| C．a most pleasant | D．the most pleasant |
Mr.Stevenson is great to work for ——I really couldn't ask for a ________ boss.( 2011·全国Ⅱ)
| A．better | B．good |
| C．best | D．still better |