—I'm sorry to keep you waiting long. I'll make shorter work of this.
— __________. I'm not in a hurry.
| A．Take it easy | B．Take your time |
| C．Not at all | D．Do as you please |
He is a man of few words, and seldom speaks until _______ to.
| A．spoken | B．speaking |
| C．speak | D．be spoken |
Though I have often heard this song _______. I have never heard you _______ it.
| A．being sung, sang | B．sang, singing |
| C．sung, sing | D．to be sung, to sing |
Tony was very unhappy for _______ to the party.
| A．having not been invited | B．not having invited |
| C．having not invited | D．not having been invited |
Though ________ money, his parents managed to send him to university.
| A．lacked | B．lacking of |
| C．lacking | D．lacked in |
The research is so designed that once _______ nothing can be done to change it.
| A．begins | B．having begun |
| C．beginning | D．begun |