Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .
| A．on which to be based | B．on which to base |
| C．which to be based | D．which to base |
The young man，determined to carry out his plan，cares little about ________others might say about it.
| A．what | B．when | C．which | D．why |
He was found ________in front of the TV set， ________the football match
| A．to sit；to watch | B．seated；watching |
| C．seating；watching | D．seated；watched |
John worked hard at his lessons and gained ________to a famous university last year.
| A．permission | B．admission | C．agreement | D．freedom |
There are 40 students in our class，who come from a ________of backgrounds.
| A．variety | B．mixture | C．extension | D．combination |
—Hi，Peter. Long time no see.
—Oh，it’s you，Jack. I’m sorry I didn’t ________ you at first.
| A．know | B．recognize | C．remember | D．realize |