参考答案：11-15 CCAAA
　　16-20 DACDA
　　21-25 CCABD
　　26-30 DBCCC
　　31-35 DBDAC
　　36. Emperors
　　37. government
　　38 .civilized
　　39. disappeared
　　40. diseases
　　41. mentally
　　42. magic
　　43. Roman
　　44. They translated the Greek and Roman medical books into Arabic.
　　45. When civilization at last came back to Europe, men once again translated the Greek and Roman works on medicine into Latin.
　　46. Slowly, they began to make new discoveries and found out more about the way the body works.