__________ in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.
| A．Waiting |
| B．To wait |
| C．Having waited |
| D．To have waited |
It___be the postman at the door.It’s only six o’clock
| A．mustn’t |
| B．can’t |
| C．won’t |
| D．needn’t |
I___sooner but I didn’t know that they were waiting for me
| A．had come |
| B．was coming |
| C．would come |
| D．would have come |
If you___smoke,please go outside
| A．can |
| B．should |
| C．must |
| D．may |
They___have arrived at lunchtime but their flight was delayed
| A．will |
| B．can |
| C．must |
| D．should |
Maria has written two novels,both of___have been made into television series
| A．them |
| B．that |
| C．which |
| D．what |