They were surprised that a child worked out the problem _____ they themselves couldn’t.
| A．once | B．then | C．if | D．while |
The managers discussed the plan that they would like to see the next year.
| A．carry out |
| B．carrying out |
| C．carried out |
| D．to carry out |
Many people agree that knowledge of English is a must in international trade today.
| A．a; \ |
| B．the; the |
| C．the; a |
| D．\ ; the |
--- John went to the hospital alone.
--- lf he me about it ，I would have gone with him (2010 .天津)
| A．should tell |
| B．tells |
| C．told |
| D．had told |
Maybe if I science, and not literature then, l would be able to give you more help. (2011 .北京 )
| A．studied |
| B．would study |
| C．had studied |
| D．was studying |
Had J known about this computer program, a huge amount of time and energy . (2010 .浙江)
| A．would have been saved |
| B．had been saved |
| C．will be saved |
| D．was saved |