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 |
It’s been years since I _____ myself so much.
| A．enjoy | B．enjoyed | C．have enjoyed | D．had enjoyed |
Could I have a cigarette? I seem to of them.
| A．have run out | B．use up | C．run out | D．have used up |
She thought I was talking about her daughter，________，in fact，I was talking about my daughter.
| A．whom | B．where | C．which | D．while |
One third of the class _____ agreed to be volunteers to help the aged this vocation.
| A．are | B．is | C．has | D．have |
At this time of next Friday, I _____ to New York by the Korean Airline.
| A．will fly | B．will be flying | C．am flying | D．will have flied |