Another drug that has helped improve people’s health is penicillin, _________ is _________ by many _________ one of the most important medicines.
| A．which, considered, being | B．that, considering, been |
| C．that, to consider, being | D．which, considered, to be |
It is a long time ________ they separated, but it won’t be long ________ they meet again.
| A．since, before | B．after, when | C．since, when | D．after, before |
Only when I checked the paper once more _________ there was a mistake.
| A．I realized | B．did I realize | C．I had realized | D．had I realized |
Bob insisted that he ________ nothing wrong and ________ from work.
| A．did; won’t be fired | B．had done; not be fired |
| C．should do; mustn’t be fired | D．do; shouldn’t be fired |
It was the hurricane ________ was called Sandy ________ left at least 10 people dead and hundreds of thousands without power on the eastern coast of America.
| A．which; that | B．what; which | C．which; who | D．that; which |
The newly-elected leaders of the Chinese government said they were ready to ________ any difficulty to build a better China.
| A．look through | B．get through | C．run through | D．go through |