She is a wellknown doctor now, but she ________ as a cleaner at the hospital for five years.
| A．has worked | B．worked |
| C．had worked | D．works |
As is known to all, earthquakes are ___________ disasters _________ can destroy buildings and kill people.
| A．nature; that | B．natural; which |
| C．nature; who | D．natural; what |
The speaker _________ his voice to make herself heard.
| A．rose | B．lifted |
| C．raised | D．reduced |
After the quake, the whole city lay in ____ ruins. However, with all the efforts, ________ new Tangshan was born.
| A．/; a | B．the; / |
| C．/; the | D．the; the |
I’d like to express my congratulations to you _________ winning the competition.
| A．to | B．in |
| C．by | D．on |
One’s life has value _______ one brings value to the life of others.
| A．so that | B．no matter how |
| C．except that | D．as long as |