They promise that the work would all be finished _______ next week.
| A．until | B．in | C．by | D．to |
This English dictionary is expensive, but it is of ________.
| A．useful | B．great use |
| C．no use | D．useless |
Unemployment is a major cause of poverty.
| A．主修的 | B．大量的 |
| C．主修课程 | D．主要的 |
Tom gave Helen an apple in exchange for a piece of cake.
| A．交换 | B．改变 |
| C．娱乐 | D．教育 |
He sat down at his desk to figure out the exact figures.
| A．图表 | B．数字 |
| C．体形，身材 | D．人物 |
He's devoted his whole life to the protection of the rare animals.
| A．保护 | B．过程 |
| C．污染 | D．位置 |