The boss ______ the worker how to do it, or the accident couldn’t have happened.
| A．can’t have told | B．ought to tell | C．could have told | D．mustn’t have told |
Exciting as its special effects are , there is too much violence in the film.
| A．to watch | B．to be watched | C．watched | D．being watched |
According to scientists, our mental abilities begin to from the age of 27 after reaching the highest level at 22.
| A．differ | B．increase | C．develop | D．decline |
If not tired from work, I will spend some time in my study every evening.
| A．locking | B．locked |
| C．having locked | D．being locked |
The research lacks evidence, and therefore, its conclusions are doubtful.
| A．solid | B．fierce | C．severe | D．potential |
The furniture, with its modern style and bright colors, suits modern house and their gardens, but looks in the garden of a traditional home.
| A．out of question | B．out of date |
| C．out of sight | D．out of place |