When I was at college I ______ three foreign languages, but I ______ all except a few words of each．
| A．spoke; had forgotten | B．spoke; have forgotten |
| C．had spoken; had forgotten | D．had spoken; have forgotten |
________ 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 |
________ you have seen both fighters，________ will win?
| A．Since；do you think who |
| B．As；who you think |
| C．When；whoever |
| D．Since；who do you think |
It was a matter of ________ would take the position.
| A．who | B．whoever | C．whom | D．whomever |