The thief______ when he was stealing a wallet from a woman.
| A．happenedtonotice | B．wastakenplacetonotice |
| C．washappenedtobenoticed | D．happenedtobenoticed |
It's suggested that some activities ________ to celebrate the 30th anniversary of the Reform and Opening up.
| A．should hold | B．are held |
| C．be held | D．will be held |
The doctor recommended that you ________ swim after eating a large meal.
| A．wouldn't | B．couldn't | C．needn't | D．shouldn't |
Jack is a great talker.It's high time that he ________ something instead of just talking.(2012·辽宁)
| A．will do | B．has done | C．do | D．did |
—Where are the children？The dinner's going to be completely ruined.
—I wish they ________ always late.(2011·北京)
| A．weren't | B．hadn't been |
| C．wouldn't be | D．wouldn't have been |
________ the problem, he wouldn't have committed those mistakes.
| A．If he understood | B．Had he understood |
| C．When he had understood | D．If he would understood |