_________ in a heavy rain，Robert fell ill and couldn’t help but _________ for a leave.
| A．Caught; to ask | B．Catching; ask | C．Catching; to ask | D．Caught; ask |
If Alice ______this afternoon, the meeting should be put off.
| A．would not come | B．might not come |
| C．should not come | D．could not come |
It has been announced that candidates ( 候选人)_____remain in their seats until all the papers has been collected .
| A．can | B．will | C．may | D．shall |
What would have happened ______,as far as the river bank ?
| A．Bob had walked farther | B．If Bob should walk farther |
| C．Had Bob walked farther | D．If Bob walked farther |
_____the house Mr.Li has been broken into ?
| A．When was it that | B．When has | C．Has | D．had |
-----I thought I ______something burning .
-----Really?
| A．smelled | B．was smelling | C．could smell | D．might smell |