To read a novel before going to bed seems to me a rule ____.
| A．to never break | B．never to have broken |
| C．never to be breaking | D．never to be broken |
I suggest that the person ____put into prison.
| A．refer to | B．referred to was |
| C．referred to be | D．referring to should be |
To make members of a team perform better, the trainer first of all has to know their ___and weaknesses.
| A．benefits | B．strengths | C．techniques | D．values |
28. ____well prepared you are ,you still need a luck in mountain climbing .
Helping others is a habit，______you can learn even at an early age.
A it B. that C. what D. one
You can make a complaint to the local government ___ you are happy with the way they deal with the matter.
| A．unless | B．if | C．once | D．as |