--- Do you know him?
--- Yes, but I can’t remember ______I met him for the first time.
A. where B. what C that D. if
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 |
—Who ________ be phoning us at this time of night?
—It might be your sister.
| A．might | B．can |
| C．dare | D．must |