39. A. realize B. recognize C. ruin D. rewind
38. A. after B. when C. since D. before
37. A. touch B. taste C. feel D. sense
36. A. phenomenon B. problem C. principle D. privilege
35. A. In spite of B. Owing to C. In addition to D. At the mercy of
34. A. adopt B. grow C. multiply D. accelerate
33. A. harmed B. unharmed C. brave D. clumsy
32. A. method B. way C. means D. road
31. A. larger B. smaller C. less D. more
30. A. should B. can C. must D. may