Remember that you won't be able to cancel the contract ____you've signed.
| A．before | B．until | C．once | D．though |
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 |
In 1939，Hitler________ war against Poland，which started the Second World War.
| A．announced | B．broadcast |
| C．declared | D．advertised |