-If you have time tonight，I’d like to invite you to a ball.
-That’s very nice of you，but are you ____?
| A．free | B．careful | C．serious | D．true |
The head engineer is in ________ the project .
| A．his charge of | B．the charge of | C．charge of | D．one’s charge |
______ 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 |