— How long have you been in this office?
— Just a few minutes．My cousins _______ here together with me．
| A．have walked | B．had walked |
| C．walked | D．have been walking |
____ twice, the postman refused to deliver our letters unless we changed our dog.
| A．Being bitten | B．Bitten |
| C．Having bitten | D．To be bitten |
All of them try to use the power of the workstation ___ information in a more effective way.
| A．presenting |
| B．presented |
| C．being presented |
| D．to present |
For breakfast he only drinks juice from fresh fruit ___ on his own farm.
| A．grown |
| B．being grown |
| C．to be grown |
| D．to grow |
He was busy writing a story, onlyonce in a while to smoke a cigarette.
| A． | to stop | B． | stopping | C． | to have stopped | D． | having stopped |
Seeing the soldiers well _____ for the flood-fight, the general nodded with satisfaction.
| A．prepare | B．preparing | C．prepared | D．having prepared |