_________ no doubt that a green campus plays an important role in the growth of students, both physically and mentally.
| A．It is | B．There has | C．There is | D．It has |
The dog, _____, will be made a good watchdog.
| A．to train properly | B．being trained properly |
| C．properly to train | D．trained properly |
--- Have you considered _____ your job as a teacher?
--- Yes. I like the job because a teacher is often considered _____ a gardener.
| A．to change; to be | B．to change; being |
| C．changing; being | D．changing; to be |
When he was a boy, he used to go there and watch _____.
| A．to repair bicycles | B．bicycles to be repaired |
| C．bicycles being repaired | D．repairing bicycles |
It’s too hot today. Why not ____ your coat?
| A．taken off | B．to take off | C．take off | D．taking off |
When he was in the office, he preferred ____ something ____ nothing.
| A．to do; than do | B．to do; rather than |
| C．doing; rather than doing | D．doing; to doing |