By the time he was twelve, Edison __________ to make a living by himself.
| A．would begin | B．has begun |
| C．had begun | D．was begun |
—Go and have a good drink tonight, OK?
—_______. We need to relax ourselves.
| A．I couldn’t agree more | B．I’m afraid not |
| C．I believe not | D．I don’t think so |
Jack had his house _______ last night and he and his family were left homeless.
| A．burning down | B．to burn down | C．burn down | D．burned down |
The new secretary is a quick, _______ worker, and the boss is quite satisfied with her.
| A．subjective | B．sufficient | C．adequate | D．efficient |
The factory produced a great number of computers, most of _______ shipped to foreign countries.
| A．them | B．which | C．it | D．what |
Many women work in big companies，but in the boardrooms of most big companies, women are in the _______.
| A．scarcity | B．minority | C．majority | D．popularity |