“It’s twelve o’clock, I think I must be off now.” “Oh, really？ I ______ it at all.”
| A．don’t realize | B．haven’t realized |
| C．didn’t realize | D．hadn’t realized |
If you want to book tickets for the 2012 Olympic Games, just call 00952012．It ______ be simpler．
| A．mustn't | B．shan't | C．needn't | D．couldn't |
Would you be kind enough to help the boy _____ Chinese is really hard to learn?
| A．who | B．whose | C．for whom | D．from whom |
_____ in the library regulations that any book borrowed be returned by due time, or the borrower will be fined．
| A．What is required | B．It is required |
| C．As is required | D．Which is required |
—How did you like the concert last night ?
—I enjoyed it very much, but the dancers _____ a better job．
| A．could have done | B．must have done |
| C．could do | D．had done |
I appreciate _____ the opportunity to work in your company two years ago．
| A．giving | B．to give |
| C．being given | D．to be given |