As far as I know, this is a type of music popular in the 1950s, a(n) _____ of jazz and folk music.
| A．mixture | B．tradition | C．practice | D．invention |
Nobody would stand out admitting the fact，for some reason，________ they lost the game.
| A．that | B．which | C．what | D．why |
David Beckham has ________ it takes to become a professional football player.
| A．who | B．what | C．which | D．that |
________ has been mentioned above，continued chairman after he took a sip of coffee，________ the project must be carried out before spring flood comes.
| A．As；that | B．That；which |
| C．This；which | D．It；that |
There is a common belief among them ________ rubbish can and should be put to good use.
| A．which | B．if | C．whose | D．that |
China's success in manned－spacecraft travel shows ________ our country has become one of the greatest powers in space research.
| A．what | B．which | C．/ | D．it that |