20. A. crying B. laughing C. tapping D. sewing 答案及详解： A：1-5 BACDC 6-10 ADABC 11-15 DAABB 16-20 DCBCD

本文通过父亲戒酒成功这件事，说明了世上无难事，只要意志坚定的道理。

19. A. different B. hard C. pleasant D. serious

18. A. supplied B. offered C. paid D. contributed

17. A. kindness B. memory C. comfort D. support

16. A. wound B. defeat C. cut D. hurt

15. A. more B. excellent C. strange D. huge

14. A. therefore B. although C. yet D. however

13. A. content B. break C. fall D. shout

12. A. hand B. face C. hair D. back

11. A. and that B. now that C. but that D. so that