2000 ~ 2005 Äê¸ß¿¼Ìâ»ã±à
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1. Every possible means _____ to prevent the air pollution, but the sky is still not clear. (2000ÉϺ£´º) (C)
A. is used B. are used C. has been used D. have been used
2. As a result of destroying the forest, a large ___ of desert ___ covered the land. (2001ÉϺ£) (B)
A. number, has B. quantity, has C. number, have D. quantity, have
Ö÷ ν Ò» ÖÂ
1. Every possible means _____ to prevent the air pollution, but the sky is still not clear. (2000ÉϺ£´º) (C)
A. is used B. are used C. has been used D. have been used
2. As a result of destroying the forest, a large ___ of desert ___ covered the land. (2001ÉϺ£) (B)
A. number, has B. quantity, has C. number, have D. quantity, have

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