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 __61 salesmen who drank coffee and ate cheeseburgers when they stopped to__62 their 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't closed the door__63 .
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 park__64 mobile homes(活动住房) and all night self-help laundry.
Hilton was a pioneer in a 24-hour__65 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 are__66 to be open all night. __67 is this really a good thing?
A lot of research has been done in America on the effect of 24-hour working, and
there is growing__68 about the long-term dangers of a society that doesn't 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. __69 of the worst man made disasters happened in the last few hours before dawn ,when even the most experienced night-worker has difficulty__70 awake.
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.on B. at C. of D. for
65.A.working trend B. touring business C. banking service D. delivering system
66.A.performing B. pretending C. beginning D. hesitating
67.A.Thus B. And But D. Furthermore
68.A.concern B. understanding C. interest D. sense
69.A.Few B. Several C. None D. All
70.A.preserving B. becoming C. maintaining D. staying
