While working in the countryside, the students a great deal of knowledge on plant life.
| A．looked up | B．picked up | C．put up | D．called up |
Sorry，Cathy，I didn’t know that you were badly short of money then.But you ________ me for help.
| A．must have asked |
| B．could have asked |
| C．would have asked |
| D．may have asked |
—May I take this book out of the reading room?
—No，you ________.You read it in here.
| A．mightn’t | B．won’t |
| C．needn’t | D．mustn’t |
—I regret to say that I failed to rank first in the terminal exam.
—Come on，nobody ________ win all the time.
| A．should | B．must |
| C．shall | D．can |
These days some young people just ________ work hard because they have got used to the easy life provided by their parents.
| A．mustn’t | B．won’t |
| C．mightn’t | D．shouldn’t |
It’s a pity that Andrew didn’t want to go to the conference.________ willing to go，we could have paid all his expenses.
| A．Had he been | B．Being |
| C．Was he | D．He had been |