Every minute is made full ______ of ______ our lessons.
| A．use; to study | B．use; studying | C．useful; studying | D．to use; study |
You _____ phone him if you want to, but you _____! He will surely phone you.
| A．may; mustn’t | B．have to; needn’t | C．can; needn’t | D．can; doesn’t need |
My aunt _____ here by now, for she took the early bus.
| A．must arrive | B．can arrive | C．may arrive | D．ought to have arrived |
The pilot kept calm in the terrible storm, otherwise the accident ______.
| A．couldn’t be prevented |
B．mustn’t have prevented |
C．wouldn’t have been prevented |
D．shouldn’t prevent |
You _____ pay your library fines. If not, you _____ not be allowed to graduate.
| A．may; should | B．should; need | C．must; will | D．will; can |
If I ________ plan to do anything I wanted to. I’d like to go to Tibet and travel through as much of it as possible.
| A．would | B．could | C．had to | D．ought to |