I tried hard to get some information about the new technology out of his mouth, but he remained_________．
| A．quiet | B．secret | C．silent | D．calm |
We would appreciate it if customers don't______ to leave their suggestions and expectations for our product.
| A．hesitate | B．pretend | C．undertake | D．offer |
Lily was talking to our teacher about examination, when suddenly Tom _______.
| A．cut off | B．cut out | C．cut up | D．cut in |
While I_________that he is an excellent leader,I don’t think he can do a good job in this company because he is too careless.
| A．reflect | B．recommend | C．acknowledge | D．urge |
The two Chinese scientists have made a wonderful discovery, which marks a major _______ in the basic research in the field.
| A．reform | B．approach | C．boundary | D．breakthrough |
The incident caused a hot discussion on the Internet, but the local government had no immediate _______ on it.
| A．adjustment | B．commitment | C．comment | D．document |