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

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

解析【小題1】動詞不定式作后置定語，修飾laws。故填to keep。
【小題2】it是形式主語，真正的主語是后面的動詞不定式。清理被污染的河流要花很長時間。故填to clean。
【小題3】enjoy doing sth.“喜歡做某事”。現在，人們又可以在河里游泳了。故填swimming。
【小題4】used to do sth.“過去常常做某事”。故填to put。
【小題5】“隨著人口的增長，垃圾也在增多。”，根據increased可知，應該用過去式。故填grew。
【小題6】advise sb. to do sth.“建議某人做某事”。科學家建議商人通過循環使用來賺錢。故填to make。
【小題7】不定式表示目的，pick up“撿起”。故填to pick。
【小題8】tell sb. to do sth.“告訴某人做某事”。故填to collect。
【小題9】a way to do sth.“一種做某事的方法”；save...from...“保護......不受......”。故填to save。
【小題10】by“通過”，是介詞，后加動名詞。通過垃圾的再次利用來保護環境。故填using。