Can you imagine how much trouble I have __________ the work?
| A．to do |
| B．did |
| C．do |
| D．doing |
The engine just won't start. Something seems __________ wrong with it.
| A．to go | B．to have gone |
| C．going | D．having gone |
When he came in, I happened __________ my experiment in the lab.
| A．to do | B．to be doing |
| C．to have done | D．to be done |
Now I've got him in my __________；I can make him do anything I want.
| A．energy | B．strength |
| C．power | D．right |
The doctor thought __________ would be good for you to have a holiday.
| A．this | B．that |
| C．one | D．it |
The boy entered the room quietly in order to avoid __________ his parents.
| A．being waken up | B．to wake up |
| C．waking up | D．to have waken up |