Those first students learned reading， writing， and calculation. Having these skills gave people great power over those who did not have them. Some 5，000 years later， this is still true.

　　( )51. The main idea of this article is that schools ________.

　　A. had great power B. became necessary for learning

　　C. taught children to hunt D. developed language

　　( )52. You can decide from the article that schools have ________.

　　A. made education difficult B. held back learning

　　C. imitated parents D. advanced human skills

　　( )53. What happened before Egyptians discovered calculation?

　　A. Egyptians discovered writing. B. Egyptians started schools.

　　C. Sumerians invented writing. D. Sumerians started schools.

　　( )54. Education became possible only with the development of _______.

　　A. learning B. language C. calculation D. clocks