is known to us all that the old scientist，for life is hard in the past，still works hard in his eighties．
| A．It；whom | B．As；whom | C．As；whose | D．What：whom |
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 |
I read about you and decided to come and hear you play.I’m very glad I ______the effort.
| A．made | B．have made | C．had made | D．am making |