52. According to Paragraph 1, who are primarily the readers of the Post? (A) Businessmen. (B) College students. (C) Housewives. (D) Politicians.

48. What is the problem with hip or knee replacements in the U. S. ? (A) A lot of patients need a second operation. (B) Doctors are not well trained to ensure successful operations. (C) Demands for hip replacement exceed the number of surgeons. (D) Replacement operation is becoming too expensive in U. S. hospitals.