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 |
Yunnan province in China was attacked by such a terrible drought this early spring ____________few people had experienced before, ____________ made us worry about global climate changes.
| A．that; that | B．as; which | C．which; it | D．when; as |
____________ he was the last man I wanted to see. I did all that I could to help him.
| A．As | B．Now that | C．While | D．As though |
Although Tom did not actually get the best scores on every single test, ____________his high scores on the psychological tests____________finally won him his position as the best pilot.
| A．it is; which | B．it was; that | C．it has been; that | D．it was; where |
．Maria, do tell us a little about the Venice Film Festival, ____________?
| A．will you | B．can you | C．don’t you | D．would you |
A number of people have posted their own videos on the website You Tube, ____________their attempts to become “musicians”.
| A．to show | B．showing | C．showed | D．show |