Bad habits, ____formed, are difficult, and sometimes impossible to shake off.
| A．once | B．before | C．until | D．unless |
He was too busily occupied _____ to the show.
| A．to go | B．going |
| C．with going | D．in going |
We must _____ a new chair for the broken one.
| A．instead | B．instead of |
| C．substitute | D．take the place |
My camera can be________ to take pictures in cloudy or sunny conditions.
| A．adapted | B．adjusted |
| C．fit | D．revised |
After the accident，the police spent a week finding out the person who________ it.
| A．witnessed | B．stared at |
| C．proved | D．heard of |
Some people say that the parents should expect school to________ their children well and tell them what is “right” and “wrong”．
| A．manage | B．control |
| C．conduct | D．drive |