Tony decided to study abroad _______ he knew he would meet many difficulties.
| A．as if | B．because | C．unless | D．even if |
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 |
He did not find a job yet because he had no___to men who could help him
| A．approach |
| B．application |
| C．access |
| D．approval |