9.（填空题）电脑和互联网给我们的生活带来很大变化。Computer and the Internet ______ great changes in our lives.

31.（填空题）我们决不能对他们的要求让步。We must not ___________ their demands.

30.（填空题）营养不足导致生产力低下。Poor nutrition leads to__________ .

29.（填空题）她是一个紧跟最新时尚的女孩。She is a girl who is eager to follow ___________ fashions.

28.（填空题）没有常识的知识没什么价值。Knowledge without __________ counts for little.

27.（填空题）新鲜空气对健康是不可缺少的。Fresh air is____________to good health.

26.（填空题）我们必须为每次任务做好准备。We must________________ each task.

25.（填空题）这两者之间有本质的区别。There are ______________ between the two.

24.（填空题）这几种纤维是用石油这种不可再生的资源制造的。The fibers are made from oil—a___________ resource.

23.（填空题）各种因素导致了他的失败。Various factors____________ his failure.

22.（填空题）睡眠会影响人的免疫反应。Sleep can influence people＇s _______________.