问题补充：
DC Hilton was one of the first Americans to find out that there was money to be made in the middle of the night.42 years ago he bought a small restaurant on US highway 69,in Oklahoma.His main customers were truck drivers and 61salesmen who drank coffee and ate cheeseburgers when they stopped to62their journey.
It was they who first tried to persuade Hilton to remain open all night.He thought about it for a while,and then suddenly made up his mind.He took the door key and threw it across the road.He hasn closed the door63.
Over the years his simple burger cafe has expanded into a 24-hour roadside empire,with a 100-seat restaurant,a petrol station,a mini shopping market,a car park64 mobile homes(活动住房) and all night self-help laundry.
Hilton was a pioneer in a 24-hour65 which has now caught on around the world.Today not only restaurants but also banks,supermarkets,mail order firms,travel agencies and many other businesses are66to be open all night. 67is this really a good thing?
A lot of research has been done in America on the effect of 24-hour working, and
there is growing68about the long-term dangers of a society that doesn sleep.Americans are said to be sleeping 20% less than they did 100 years ago,and 55% claim to suffer at least occasionally from over-tiredness. 69of the worst man made disasters happened in the last few hours before dawn ,when even the most experienced night-worker has difficulty70awake.
61.A.travelling B. walking C. entering D. coming
62.A.start B. continue C. break D. enjoy
63.A.ever B. since C. later D. then
64.A.onB. at C. of D. for
65.A.working trendB. touring business C. banking serviceD. delivering system
66.A.performing B. pretending C. beginning D. hesitating
67.A.Thus B. AndBut D. Furthermore
68.A.concern B. understandingC. interest D. sense
69.A.Few B. Several C. None D. All
70.A.preservingB. becomingC. maintaining D. staying61--70 ACBDA CCABD
答案：
(答案→)61--70 ACBDA CCABD
解析：
61.下文中的their journey对做出正确选择作了提示，说明他们在旅途中。答案为A。
62. break中断。根据上文中的stopped可确定答案。当那些卡车司机和商贩在旅途中停下来进行短暂的休息时，他们喝点咖啡，吃点cheeseburger(放有干酪的肉饼)。答案为C。
63.这个句子的谓语动词用了现在完成时，since从此以后，常与完成时连用。从此以后他再也没关过门；ever曾经，常用于肯定句中，否定句是：He has never closed the door；later后来，常与一般过去时连用。答案为B。
64. mobile houses是一种用汽车装载的活动住房。for“为了”。a car park for mobile house为装载着活动住房的汽车提供的停车场。答案为D。
65.a 24-hour working trend二十四小时工作的趋向。下文的内容告诉我们，二十四小时工作已成为全球的趋向。而且，根据DC Hilton工作的性质，容易排除B、C和D项。touring business旅游事业；banking service银行服务业；delivering system邮递系统。答案为A。
66.上文说明24小时工作成为一种趋向，很多行业开始整夜开放。A项performing“表演”；B项pretending“假装”；D项hesitating“犹豫”，均不合题意。答案为C。
67.根据下一段的内容可判断出is this really a good thing?是对二十四小时工作提出的质疑，所以两句之间是转折关系，要用But填写。Furthermore“另外”。答案为C。
68.be growing concern about对……关心不断增加。人们越来越多地对不睡觉对社会所造成的长远危险予以关注。B项understanding“理解”；C项interest“兴趣”；D项sense“意识”。答案为A。
69.several几个。意思是：最严重的人为灾难发生在黎明前。而few和none都表示否定，all表示全体，都与短文内容不符。答案为B。
70.stay awake保持清醒的状态。preserve“保护，维护”，后常接名词；become表示由不清醒向清醒变化的过程；maintain作系动词的意思是“维持”。答案为D。
