36 Elizabeth Clay decided to go home and spend the holiday with her parents . The next day she drove her old car home along the road . 36 she found she got a flat . The 22-year-old student 37 to stop her car by the side of the road in the winter night and opened the trunk . No 38 tire .At this time , a car 39 . Paul and Diane told Clay to 40 them to a service station near their 41 . They arrived to see that it had no suitable tires to 42 with her car . “Follow us home,” said Paul .The couple called around to find a tire , No 43 . They decided to let her use their own car . “Here ,” Paul said , handing Clay a 44 of keys , “Take our car . We 45 be using it over the holiday .”Clay was 46 . “But I’m going all the way to South Carolina , and I’ll be gone for two weeks ,” she 47 them .“We know,” Paul said . “We’ll be 48 when you get back . Here’s our number if you need to 49 us .”Unable to believe her eyes ,Clay watched as the 50 put her luggage into their car and then 51 her off . Two weeks later she 52 to find her old car cleaned inside and out with three new tires and the radio 53 .“Thank you so much ,” she said . “How much do I 54 you ?” “Oh, no,” Paul said , “we don’t want any money . It’s our 55 .” Clay realized that while it might have been their pleasure , it was now her duty to pass on their “do unto others” spirit .．
(A)．Suddenly
(B)．Finally
(C)．Immediately
(D)．Fortunately