Jack is a great talker. It's high time that he ________ something instead of just talking.
| A．will do | B．has done |
| C．do | D．did |
Had they known what was coming next, they _________second thoughts.
| A．may have | B．could have |
| C．must have had | D．might have had |
Had you taken it more seriously, you ________ such a silly mistake.
| A．may not make | B．couldn’t make |
| C．mustn’t have made | D．wouldn’t have made |
_________, the world would be more harmonious.
| A．Weren't there any wars |
| B．There weren't any wars |
| C．Were there no wars |
| D．Had there no wars |
（2014） ourselves from the physical and mental tensions，we each need deep thought and inner quietness.
| A．Having freed | B．Freed |
| C．To free | D．Freeing |
______ in a well-known university is what everybody wishes for.
| A．Educated | B．Being educated |
| C．To educate | D．Educating |