49. A. took on B. put on C. kept on D. got on
48. A. searching B. working C. asking D. advertising
47. A. with B. for C. of D. by
46. A. written B. read C. seen D. done
45. A. how B. what C. where D. whether
44. A. put B. jump C. dive D. look
43. A. writer B. doctor C. actor D. worker
42. A. saw B. noticed C. looked D. found
41. A. passing B. flying C. rushing D. sitting
40. A. dictionary B. computer C. diary D. book