Without facts , a person can’t form a correct opinion , for he needs to have actual knowledge _____ his thinking .
| A．which to be based on | B．on which to base |
| C．which to be based | D．which to base |
I hope not to be called on in class to answer the question as I am not yet___________ prepared.
| A．aggressively | B．adequately |
| C．attentively | D．actively |
It is reported that China plans to__________ its controversial temporary residence permit and push forward reform of the household registration system.
| A．refresh | B．subscribe |
| C．abolish | D．reserve |
Don’t let the chance slip away! I can __________ you that my investments will double your income within no more than one year.
| A．possess | B．sponsor |
| C．instruct | D．guarantee |
All work and no play makes Jack a dull boy, which suggests that work and play do not _________ but promote each other.
| A．conduct | B．convey |
| C．contradict | D．confirm |
Los Angeles Times reported that researchers may have found a way to _________ human life by changing certain genes, so that humans might expect to live twice as long.
| A．extend | B．preserve |
| C．multiply | D．transform |