24.Nowadays natural gas,wind and other forms of　　　 are widely used in the country.

　 A.energy　　　　　 B.force　　　　　　 C.power　　　　　　 D.materials　　　

23.After climbing to the top of the mountain,he was not　　　 tired and stopped to have a rest.

　 A.a bitful　　　　 B.a little　　　　 Ca great deal　　　 D.much more　　　

22.I have already 　　　　promised them that we shall assist them in their difficulty.

　 A.as well as 　　　 B.as good as　　　 C.as long as　　　 D.as far as　　　

Ⅰ. 单元要点练习。(7.5分)

21.Everyone liked the stranger,but　　　　 he was a criminal.

　 A.in reality　　　 B.realities　　　　 C.for reality　　　 D.for realities　

110. give up smoking

109. Unwilling

108. at a speed of 100km per hour

107. is not content with