_____ through this book and tell me what you think of it.
| A．Look | B．Looking |
| C．To look | D．Having looked |
If you hadn’t gone with Tom to the party last night, .
| A．you would meet John already |
| B．you won’t have missed John |
| C．you will have met John |
| D．you would have met John |
I it to him if he didn’t understand.
| A．shall explain |
| B．will explain |
| C．would explain |
| D．explain |
I would ask George to lend us the money if I him.
| A．had known |
| B．knew |
| C．have known |
| D．know |
_ your help, we’d never have been able to get out of trouble.
| A．Had it not been |
| B．If it was not |
| C．If we had not been |
| D．If there has not been |
You will succeed in the end you give up halfway.
| A．even if |
| B．as though |
| C．as long as |
| D．unless |