It has been announced that candidates(应考者) ________ remain in their seats until all the papers have been collected.
| A．can | B．will |
| C．may | D．shall |
Grace doesn't want to move to New York because she thinks if she ________ there, she wouldn't be able to see her parents very often.
| A．lives | B．would live |
| C．has lived | D．were to live |
If he had spent more time practising speaking English before, he ________ able to speak it much better now.
| A．will be | B．would be |
| C．has been | D．would have been |
If we ________ a table earlier, we wouldn't be standing here in a queue.
| A．have booked | B．booked |
| C．book | D．had booked |
—Where ________ Mary have put the empty bottles?
—She ________ them away. They must be somewhere.
| A．can; can't have thrown |
| B．must; needn't |
| C．must; must have thrown |
| D．can; mustn't have thrown |
Some young people these days just ________ go out of their homes to contact the real world.
| A．mustn't | B．won't |
| C．mightn't | D．shouldn't |