53. A. take B. put C. bring D. use
52. A. Many B. The other C. Few D. Some
51. A. things B. matters C. materials D. goods
50. A. mastered B. invented C. discovered D. learned
49. A. language B. sound C. meaning D. secret
48. A. number B. group C. score D. dozen
47. A. unless B. if C. when D. because
46. A. the second B. the other C .another D. else
45. A. remains B. contains C. includes D. means
44. A. spirit B. secret C. method D. purpose