Only when he returned home ______ what had happened.
| A．did he realize | B．he realized |
| C．he did realize | D．has he realized |
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 |
Try to________ at least an hour each day for learning new vocabulary.
| A．set off | B．set out |
| C．set aside | D．set down |