— Isn’t it hard to drive downtown to work?
— Yes, that’s why I to work by train.
| A．have been going | B．was going |
| C．have gone | D．will have gone |
______ began our new lesson.
| A．But | B．Such | C．Thus | D．So that |
I didn’t manage to do it _____ you had explained how.
| A．until | B．unless | C．when | D．before |
According to the time table , the train for Beijing______ at seven o’clock in the evening .
| A．leaves | B．has left | C．was left | D．will leave |
Henry escaped ____ by admitting his mistake.
| A．being punished | B．having been punished |
| C．having punished | D．punishing |
I first met Lisa three years ago. She _____ at a shop at the time.
| A．has worked | B．was working |
| C．had been worked | D．had worked |