题目

题型：不详难度：来源：

  Life today has brought about new problem. One of the biggest problems of every nation is pollution. In America, there are laws ___66_____the air and water clean. These are new laws and it has taken much time __67____ a polluted river or lake. Now the fish are healthy again and people can enjoy __68_____in the clean water. 
When food is brought from the store to the home, it is packed in paper, glass, or plastic. Every day a newspaper comes to the home. Americans use __69_____all these materials in the garbage which was picked up by a large truck. The truck these materials to a garbage dump or a land-fill. The truck dumped the garbage into a large hole and then earth was pushed over the garbage until the hole was filled. Then, a new hole must be found.
As the years went by, the garbage increased as the population __70_______. Scientists suggested using some garbage again. They advised businessmen _____71____money by recycling or using paper, glass, and plastic again.
Now, a recycling truck comes to each home once a week __72_______ up materials. American families are told _____73_____their newspaper in boxes and clean all glass, and plastic. The truck takes them to factories for recycling.
Recycling is a way _____74_____the environment from pollution by __75_____ many materials again.

答案

小题1:to keep
小题2:to clean
小题3:swimming
小题4:to put
小题5:grew
小题6:to make
小题7:to pick
小题8:to collect
小题9:to save
小题10:using

解析

小题1:动词不定式作后置定语，修饰laws。故填to keep。
小题2:it是形式主语，真正的主语是后面的动词不定式。清理被污染的河流要花很长时间。故填to clean。
小题3:enjoy doing sth.“喜欢做某事”。现在，人们又可以在河里游泳了。故填swimming。
小题4:used to do sth.“过去常常做某事”。故填to put。
小题5:“随着人口的增长，垃圾也在增多。”，根据increased可知，应该用过去式。故填grew。
小题6:advise sb. to do sth.“建议某人做某事”。科学家建议商人通过循环使用来赚钱。故填to make。
小题7:不定式表示目的，pick up“捡起”。故填to pick。
小题8:tell sb. to do sth.“告诉某人做某事”。故填to collect。
小题9:a way to do sth.“一种做某事的方法”；save...from...“保护......不受......”。故填to save。
小题10:by“通过”，是介词，后加动名词。通过垃圾的再次利用来保护环境。故填using。