Sam _____ some knowledge of the computer just by watching others working on it.
| A．brought up | B．put up | C．set up | D．picked up |
They talked a lot about the things and persons ________they saw in the Vancouver Winter Olympics.
| A．which | B．that | C．whom | D．what |
We didn’t know you were in trouble at that time, _______ we would have given you a hand.
| A．while | B．when | C．therefore | D．otherwise |
She remained ______ for a while after the movie ended, which made others ______.
| A．sitting; puzzling | B．sat; puzzled |
| C．seated; puzzled | D．seated; puzzling |
Is there anyone in your class ______family is in the country?
| A．whose | B．whom | C．of whom | D．who |
No one can prevent the plan __________.
| A．from carrying out | B．to be carried out |
| C．being carried out | D．to carry out |