单项选择题Which university did historian Patrice Higonnet graduate from
填空题The percentage of people who send cards to themselves on February 14 is ______.
填空题The probable relationship between the two speakers is doctor and ______.
单项选择题A.resulted fromB.given offC.turned upD.brought on
单项选择题How many people worldwide have been infected with HIV since the start of the epidemic