. Some experts are warning that the step the US government has taken to deal with the current crisis is ______ of much risk.
| A．ones | B．one | C．that | D．those |
—We’d better_______ if we want to be on time．
—OK．
| A．sweep up | B．use up | C．speed up | D．set up |
Was it midnight_________ you fell asleep while reading with the candle still burning?
| A．when | B．then | C．that | D．in which |
She spoke very confidently because she wanted to make a great___________ on her employer．
| A．influence | B．pressure | C．impression | D．effect |
The achievements of the greatest minds in science could never have been reached________ the patient work of hundreds of others．
| A．were it not for | B．had it not been because |
| C．had it not been for | D．if it had not been |
The plans should be drawn as ________as possible，showing all the measurements．
| A．authentic | B．accurate | C．correct | D．proper |