29. A. as soon as                B. as long as     C. because                  D. when

28. A. who                  B. whoever            C. whom                      D. whichever

27. A. come                       B. survive             C. last                     D. appear

26. A. famous           B. proud          C. busy                    D. comfortable

25. A. easily                    B. naturally         C. long             D. fast

 24. A. surprise             B. curiosity         C. joy                         D. thanks

 23. A. made                       B. dried                     C. finished                 D. sold

 22. A. bought                      B. used           C. heated               D. searched

 21. A. test                          B. think            C. notice                        D. show

 20. A. evening              B. afternoon              C. morning                      D. moment