It was not until I went through his paper that __________ what rapidprogress he had made in writing.
| A．had I found | B．did I find |
| C．I had found | D．I found |
The bread ___ bitter.
| A．is tasted | B．was tasted | C．tastes | D．eats |
He used the small room ___ a lab.
| A．like | B．as | C．to | D．about |
He will go to school by bike ____ on foot.
| A．instead | B．of | C．instead of | D．no |
Soon the hall was filled ____ people.
| A．with | B．in | C．into | D．without |
He allowed me ____ the experiment.
| A．to do | B．do | C．doing | D．did |