In the experiment we kept a watchful eye __________ the development and recorded every detail.
| A．with |
| B．on |
| C．for |
| D．to |
As nobody here knows what is wrong with the machine, we must send for an engineer to ______ the problem.
| A．handle | B．raise | C．face | D．present |
Mr. Brown thought it would be a good idea to have ______ from his workers to improve his plan.
| A．summaries | B．admissions |
| C．comments | D．connections |
The politician’s speech _______ the others that he was the man for the job.
| A．informed | B．convinced |
| C．reminded | D．warned |
Julia, if you hurry up, I think it quite _______ that you will catch the next train.
| A．probably | B．certainly |
| C．likely | D．possibly |
Only ______ the painting _______ decide whether it is worth buying.
| A．that he sees; can he |
| B．that does he see; he can |
| C．when he sees; can he |
| D．when does he see; can he |