After a series of food safety incidents, the government has ______ that not enough has been done to guarantee people green and healthy food.
| A．revised | B．recalled | C．recollected | D．reflected |
While doubts about the medicine’s safety have____________, interest continues to grow.
| A．dropped out | B．fell down | C．withdrew from | D．faded away |
Do you know in what circumstances was it____________ Jack achieved his goal?
| A．how | B．where | C．when | D．that |
If penicillin _____________ available, many people ______________ from sickness.
| A．weren’t , would have died | B．shouldn’t be, would die |
| C．hadn’t been, would have died | D．is, will die |
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 |
Not only _____________ vital for reducing fever, but __________ also other things that it can help with.
| A．aspirin has proved, are there | B．has aspirin proved, there are |
| C．has proved aspirin, are there | D．aspirin had proved, there are |