7. ____ people in the world are sending information by E-mail every day.

A.Several million　　　　　 B.Many millions　　　　　 C.Several millions　　　　 D.Many million

6. As a result of destroying the forests,a large ____ of desert ____ covered the land.

A.number;has　　　　　　　 B.quantity;has　　　　　　　 C.number;have　　　　　　　 D.quantity;have

4. It is not rare in ____ that people in ____ fifties are going to university for further education.

A.90s;the　　　　　　　　　　　 B.the 90s;x　　　　　　　　　 C.90s;their　　　　　　 　　　 D.the 90s;their

5 ____ of the land in that district ____ covered with trees and grass.

A.Two fifth;is　　　　　　　 B.Two fifth;are　　　　　　 C.Two fifths;is　　　　　　　　　　 D.Two fifths;is

3. Paper produced every year is ____ the world’s production of vehicles.

A.the three times weight of　　　　　　　　　　　　　　　 B.three times the weight of

C.as three times heavy as　　　　　　　　　　　　　　　　　 D.three times as heavier as

2. Mr Smith ____ me to buy several ____ eggs for the dinner.

A.asked;dozen　　　　　　　 B.suggested;dozens of　　 C.had;dozen　　　　　　　　　 D.persuaded;dozens

1.)With the help of the German experts,the factory produced ____ cars in 1993 as the year before.

A.as twice many　　　　　　 B.as many twice　　　　　　 C.as twice many　　　　　　 D.twice as many

20.A。前文提到这种生物“半人半兽”，那么如果人们真的抓住一个，将面临的问题是：把它放到动物园(当它是动物？)还是在旅馆里给它一个房间(当它是人？)

19.D。“face a problem”面临问题。

18.A。“Succeed in doing”成功地做成某事。

17.C。“take … seriously”把……当回事(严肃认真对待)。