单项选择题
Questions 11-13 are based on a talk about World AIDS Day.
A.2 million B.4 million C.19 million D.39 million
A.Challenge to class divisions. B.Maintenance of political order. C.Obedience to the rulers. D.Acceptance to their social roles.
A.Slowness in communication. B.Awkwardness in action. C.Speech defect. D.Difficulty in writing.