Jumping out of ______ airplane at a height of 5000 kilometers is ______ unforgettable experience.
| A．an ; a |
| B．an ; an |
| C．an ; / |
| D．a ; an |
Father advised me not to say anything until＿＿＿＿＿ at the meeting.
| A．asking | B．to ask | C．asked | D．ask |
You’re＿＿＿＿＿your time trying to persuade him. He’ll never join us.
| A．spending | B．wasting | C．losing | D．missing |
Well, we have been waiting here＿＿＿＿＿for the guest.
| A．long time | B．a long time | C．the long time | D．some long time |
—— Aren’t you be chairman?
—— No, and I ＿＿＿＿＿.
| A．don’t want to | B．don’t want | C．don’t want to be | D．don’t want be |
—— What do you think made the girl so glad?
—— ＿＿＿＿＿ a beautiful necklace.
| A．As she received | B．Receiving | C．Received | D．Because of receiving |