. We have the most population in the world, and most of it _______ farmers.
| A．to be | B．is | C．are | D．being |
The workers demanded that their employer_____ their working conditions.
| A．had improved | B．would improve | C．improve | D．will improve |
——Oh, I need help, doctor. Things aren't going all that well.
——Like what？Can you be more _____ ？
| A．typical | B．specific | C．actual | D．rational |
_____ Ming Ming with his sister, I find Ming Ming prefers classical music to pop music.
| A．Compare | B．Compared | C．Comparing. | D．To compare |
——Guess what！I met an old school friend last week.
——How nice！How long____ each other？
| A．didn't you see | B．haven't you seen |
| C．hadn't you seen | D．don't you see |
It_____ years ago when the incident took place, and I nearly forget it.
| A．would have been | B．should have been |
| C．ought to have been | D．must have been |