Jim who is now our English teacher once ________ as a manager in an international cooperation for 5 years.
| A．has worked | B．had worked | C．was working | D．worked |
If we___adequate preparations,the conference wouldn’t have been so successful
| A．haven’t offer |
| B．wouldn’t offer |
| C．hasn’t offered |
| D．hadn’t offered |
We would have called a taxi yesterday if Harold___us a ride home
| A．didn’t offer |
| B．wouldn’t offer |
| C．hasn’t offered |
| D．hadn’t offered |
It’s quite warm here;we___turn the heating on yet
| A．couldn’t |
| B．mustn’t |
| C．needn’t |
| D．wouldn’t |
I’m going to Europe on vacation together with John if I___find the money
| A．can |
| B．might |
| C．would |
| D．need |
I___use a clock at wake me up because at six o’clock each morning the train comes by my house
| A．couldn’t |
| B．mustn’t |
| C．shouldn’t |
| D．needn’t |