Question

  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.

Answer 1

【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。