The contributions of some companies have ________ much improvement in the teaching and learning environment in this university.
| A．carried out | B．changed from |
| C．resulted in | D．succeeded in |
Our waste recycling project ________ a lot of investigation and paperwork had been done by the end of last term.
| A．involved | B．to involve |
| C．being involved | D．involving |
Every morning Jack's wife will stand before the mirror, ________ carefully until she has to go to work.
| A．dressed | B．dressing |
| C．to dress | D．having dressed |
________ for a whole night, we still couldn't agree on when to start and where to go for the holiday.
| A．Discussed | B．Having discussed |
| C．Discussing | D．Being discussed |
In my opinion, keeping dogs well ________ up is advisable for dog owners.
| A．to tie | B．being tied |
| C．tied | D．to be tied |
The old couple, ________ in the small village for years, can tell the names of all the villagers.
| A．living | B．lived |
| C．having lived | D．to have lived |