The library needs ______, but it will have to wait until Sunday.
| A．cleaning | B．be cleaned |
| C．clean | D．being cleaned |
The old man has two sons, ____________ are working in the supermarket.
| A．both of whom | B．each of them |
| C．both of them | D．all of whom |
All her time ____________ her students, so she has no time for housework.
| A．devoted to teach | B．is devoted to teaching |
| C．is devoting to teaching | D．devoted to teaching |
With all teeth ____________, my grandfather has few choices on his diet.
| A．going out | B．staying out |
| C．working out | D．falling out |
A job in acting is becoming increasingly ____________ to young people.
| A．available | B．academic |
| C．attractive | D．energetic |
I don’t think Tom has passed the difficult exam, ____________?
| A．has he | B．don’t I |
| C．hasn’t he | D．do I |