We were told that we should follow the main road ___ we reached the central railway station.
| A．whenever | B．until | C．while | D．wherever |
I’m very grateful to my high school teachers, without ______ help I wouldn’t be so excellent.
| A．whom | B．their | C．which | D．whose |
I ______ for Shanghai this Saturday, so I want to know when the earliest plane ______.
| A．leave; takes off | B．am leaving; takes off |
| C．leave; is taking off | D．am leaving; is taking off |
He ______ it on schedule, but somehow he fell behind.
| A．must have done | B．might finish |
| C．could have finished | D．could finish |
The doctor’s dilemma was _____ he should tell the patient the truth.
| A．whether | B．which | C．that | D．what |
All we have is 24 precious hours a day and therefore we shall waste ______
| A．nothing | B．none | C．neither | D．no one |