185. Hello! I_______ you _______ in London. How long have you been here?
| A．don't know…were | B．hadn't known…are |
| C．haven't known …are | D．didn't know … were |
When we saw the road________with snow，we decided to spend the holiday at home.
| A．block | B．to block |
| C．blocking | D．blocked |
They might just have a place________on the writing course—why don’t you give it a try?
| A．left | B．leave |
| C．leaving | D．to leave |
The witnesses________by the police just now gave very different descriptions of the fight.
| A．questioned | B．being questioned |
| C．to be questioned | D．having questioned |
The airport________next year will help promote tourism in this area.
| A．being completed | B．to be completed |
| C．completed | D．having been completed |
You cannot accept an opinion________to you unless it is based on facts.
| A．offering | B．to offer |
| C．having offered | D．offered |