The mother was nervous because she had not her son who was away at a boarding school.
| A．heard from | B．heard of | C．heard about | D．heard out |
It was the training ______ he had as a young man _____ made him such an excellent speaker.
| A．which; which | B．which; that | C．that; which | D．that; what |
---Why did you leave that position?
---I a better position at IBM.
| A．offer | B．offered | C．am offered | D．was offered |
--Have you got the leaving time of the train for me?
---Yes, but you’d better ____of it by yourself.
| A．make sure | B．be sure | C．to make sure | D．be certain |
Jumping out of ______ airplane at ten thousand feet is quite ______ exciting experience.
| A．/; an | B．/; the | C．an; an | D．the; the |
What do you think ____________ at this time last night?
| A．has he done | B．he has done | C．was he doing | D．he was doing |