—Catherine, I have cleaned the room for you.
—Thanks. You _____it. I could manage it myself.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |
What the boy enjoys _____ to have a room of his own.
| A．being | B．to be |
| C．is | D．are |
Which do you enjoy ____ your weekend, swimming or fishing?
| A．spending | B．being spent |
| C．spend | D．to spend |
I think this is the very work that we must finish ____ her.
| A．to help | B．help |
| C．helping | D．helped |
The work he devoted his time to _____ worth praising.
| A．was | B．be |
| C．being | D．been |
The theory he sticks to ______ to be of no use in our studies.
| A．proves | B．prove |
| C．proving | D．be proved |