Sam _______some knowledge of the computer just by watching others working on it.
| A．brought up | B．looked up | C．picked up | D．set up |
Despite the warm personal relations with Hu, Bush admitted that ___ differences remain between the two countries, which makes ____ dialogue imperative.
| A．the; a | B．the; / | C．/; a | D．/;/ |
_____ was very ____ that little Jim wrote the letter.
| A．It; careful | B．It; carefully | C．He; careful | D．He ; carefully |
He has lots of friend, only a few of ____ invited to his wedding.
| A．whom | B．them | C．which | D．who |
Villagers here depend on the fishing industry, _____ there won’t be much work.
| A．where | B．that | C．by which | D．without which |
Mr. Smith got to ______ there was once an old temple.
| A．what | B．where | C．that | D．which |