完形填空。 There was once a young couple who lived very happily together. The only thing they worried about was 1 their happiness would last forever. An old man told them, ' 2 around the world and look for a happy 3 . Ask them for a piece of cloth 4 the man's shirt. Then you will stay 5 .' They began their journey to 6 the happiest couple. Whenever they heard about a happy couple, they would ask them, 'Are you the happiest couple?' They replied, 'Yes, we are happy in 7 way except that we don't have any children.' Actually they were not the happiest so the couple 8 their journey. They met another couple in a city. 9 they were happy, they had lots of children, which made them uncomfortable. This couple didn't 10 like the happiest, either. They continued traveling to many different places 11 they just couldn't find what they were 12 . One day they met a shepherd (牧羊人). His 13 was looking after a lovely baby. The young couple asked them the same question. They 14 , 'Everybody is happier than the king.' The young couple immediately 15 that they were the happiest couple and asked for a piece of cloth from the shepherd's 16 . The shepherd said, 'If I give you the cloth, then I will be 17 without any clothes because I have only one shirt. They then 18 that it was difficult to find perfect happiness. The wife then said, 'It's important to 19 two things if we want to be happy. First, we should be 20 with whatever we have. And second, we must always be patient.' (     )1. A. why (     )2. A. Travel (     )3. A. man (     )4. A. from (     )5. A. young (     )6. A. find (     )7. A. no (     )8. A. stopped (     )9. A. Although (     )10. A. say (     )11. A. and (     )12. A. looking for (     )13. A. daughter (     )14. A. cried (     )15. A. saw (     )16. A. shoes (     )17. A. left (     )18. A. insisted (     )19. A. forget (     )20. A. careful B. that B. Turn B. couple B. in B. beautiful B. ask B. another B. changed B. Because B. think B. but B. looking at B. wife B. jumped B. realized B. tie B. thanked B. suggested B. remember B. satisfied C. whether C. Run C. woman C. with C. happy C. see C. every C. dropped C. Since C. sound C. because C. thinking about C. son C. answered C. said C. trousers C. told C. trusted C. express C. peaceful D. which D. Fly D. girl D. for D. kind D. beg D. both D. continued D. If D. smell D. unless D. waiting for D. friend D. received D. lost D. shirt D. called D. understood D. imagine D. surprised