True friendship is like sound health, _____ value is seldom known until it is lost.
| A．whose | B．of which | C．as | D．which |
As far as I am concerned，education is about learning and the more you learn，________.
| A．the more for life are you equipped |
| B．the more equipped for life you are |
| C．the more life you are equipped for |
| D．you are equipped the more for life |
I would appreciate it ________ you call back this afternoon for the doctor's appointment.
| A．until | B．if | C．when | D．that |
John shut everybody out of the kitchen ________ he could prepare his grand surprise for the party.
| A．which | B．when | C．so that | D．as if |
________ the police thought he was the most likely one，since they had no exact proof about it，they could not arrest him.
| A．Although | B．As long as |
| C．If only | D．As soon as |
The medicine works more effectively ________ you drink some hot water after taking it.
| A．as | B．until | C．although | D．if |