52. A. actor B. teacher C.audience D. student
51. A. things B. differences C. points D.similarities
50. A.carefully B. badly C. well D. actively
49. A. tell B. express C. show D. mean
48. A. talking B. thinking C. hearing D. saying
47. A. making B. changing C. expressing D. giving
46. A. hear B. see C. think D. guess
45. A. tongues B. words C. legs D. arms
44. A. for B. before C. behind D. with
43. A. act B. talk C. say D. report