.
The motto for the scientific park makes _______ clear that science and business must work together to build the future.
| A．that | B．it | C．this | D．one |
_______ the programme, they have to stay there for another two weeks.
| A．Not completing |
| B．Not completed |
| C．Not having completed |
| D．Having not completed |
—Is there any news about my promotion?
—I regret _______ you that we’ve chosen someone else for the job.
| A．telling | B．to have told |
| C．to tell | D．to be telling |
The old man, _______ abroad for twenty years, is on the way back to his motherland.
| A．to work | B．working |
| C．to have worked | D．having worked |
Don’t sit there _______ nothing.Come and help me with this table.
| A．do | B．to do |
| C．doing | D．and doing |
______ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
| A．To wait | B．Have waited |
| C．Having waited | D．To have waited |