As we all know, Jack is experienced _____ the problem of this kind.
| A．to work out | B．at working | C．at working out | D．for working out |
—— My son has won the singing competition.
——_________.
| A．Thank you | B．Congratulations |
| C．You are right | D．Good luck |
We are living in an age ______ many things are done on computers.
| A．which | B．when |
| C．that | D．where |
—Lucy doesn’t mind lending you her dictionary.
—She ________ . I’ve already borrowed one.
| A．can’t | B．mustn’t |
| C．needn’t | D．shouldn’t |
Jack tried to play a trick ______ his sister but she wasn’t taken ________ .
| A．by; on | B．in; in |
| C．on; in | D．on; on |
My English-Chinese dictionary has disappeared. Who_____ have taken it ?
| A．should | B．must | C．would | D．could |