50. (1) He was sentenced to death _______ what he has stolen from the bank.
    (2) They were forced to leave their homeland _____ the Nazis got there and killed many people.
        A. that       B. since       C. because      D. because of

参考答案：
1. BDA  2. ACB  3. CAB  4. BB  5. DC  6. BC  7. BAA  8. AC
9. AC  10. BA  11. CBD 12. DA  13. CBB 14. CA  15. DCA 16. CA
17. BA  18. AD  19. AB  20. AC  21. BA  22. BB  23. CA  24. C/CD
25. BBA 26. CB  27. BC  28. DC  29. DAB 30. DC  31. CB  32. DA
33. AC  34. CA  35. DB  36. BA  37. BA  38. D/AC 39. CA  40. BC
41. AD  42. DB  43. DCB 44. A/AB 45. A/BC 46. DBB 47. BABA 48. AD
49. AD  50. DC