.
Sunday is more like Monday than it used to be. Places of business that used to keep daytime "business hours" are now open late into the night. And on the Intemet, the hour of the day and the day of the week have become irrelevant. Half a century ago in the United States, most people experienced
strong and precise dividing lines between days of rest and days of work, school time and summer time.Today the boundaries still exist but seem less clear.
The law in almost all states used to require stores to close on Sunday; in most, it no longer does. It used to keep schools open in all seasons except summer and in most, it still does. And whether the work week should strengthen its legal limits, or whether it should beco:me more¨flexible"' is often debated.How should we, as a society, organize our time? Should we go even further in relaxing the boundaries of time until we live in a world in xvhich every minute is much like every other?
These are not easy questions to ask. Part of the difficulty is that we rarely recognize the“law of time". even When we meet it face to face. We know as children that  we  havcto artend school a certainnumber of hours. a certain number of davs, a certain nLunbcr or x'etlrs --- bLll unless x~'e meet the truanrofficer  (学监)  , we may well think that we should go to school due to social customs and parents' demand, rather than abide by. As adults, we are familiar with ';extra pay for overtime work" , but less familiar with the fact tiat what constitutes  (构成)  "overtime" is a matter oflegal definition,   
When weturn the clock forward to start daylight-saving time, have we ever thought to ourselves: '*Here is the law in action"? As we shall see, the law has a great influence on how we organize and use time: compulsoryeducation law, overtime law, and daylight-saving law      as well as laws about Sunday closing,holidays, being late for work, time zones and so on. When we begin to look more closely, we will haveno trouble finding a law of time to examine and assess!
71. Which of the following is the closest in meaning to the underlined word irrelevant?
A. different        B. unrelated         C. connectedD. useless
72. By saying, "Sunday is more like Monday than it used to be" . in Paragraph l, the author means that_______
A. work time is equal to rest time
B. many people have a day off on Monday
C. it is hard for people to decide when to rest
D. the line between work time and rest time is unclear
73. The author raises the questions in Paragraph 2 to introduce the fact that people_______
A. fail to make full use oftheir time
B. enjoy working overtime for extra pay
C. are unaware of the law oftime
D. welcome flexible working hours
74. According to the passage, most children tend to believe that they go to school because they_______
A. need to acquire knowledge
B. have to obey their parents
C. need to find companions
D. have to observe the law
75. What is the main idea of the passage?
A. Our life is governed by the law of time.
B. How to organize time is not worth debating.
C. New ways of using time are changing our society
D. Our time schedule is decided by social customs.