二、单项填空（本节有10小题，每小题1分，共10分）
21. Many people agree that ______ knowledge of English is a must in ______ international trade today.
| A．a; 不填 | B．the; an | C．the; the | D．不填; the |
相关试题
While building a tunnel through the mountain, ________ .
| A．an underground lake was discovered |
| B．there was an underground lake discovered |
| C．a lake was discovered underground |
| D．the workers discovered an underground lake |
Lei Feng is always ready to help others when they are in trouble and he never ______ their request.
| A．turns up | B．turns over | C．turns in | D．turns down |
The film “A World without Thieves” a great success and brought in a large profit to the cinema .
| A．appreciated | B．enjoyed | C．won | D．seized |
—What about ______ lecture you attended yesterday?
—To tell the truth, it was too boring. I can’t stand ______ lecture like that.
| A．a; the | B．the; a | C．the; / | D．the; the |
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