题目

A boy of 14 has become the youngest student to win a place at Cambridge University. Arran Fernandez, who was  16  at home by his father, Neil, will 17  a mathematics degree at Fitzwilliam College next month and he hopes to have a career as a research mathematician to 18  the Riemann hypothesis(黎曼猜想) that has confused the brightest minds. It will make him the youngest Cambridge student  19 14-year-old William Pitt the Younger studied there in 1773.   Last night the child genius said: “I am looking forward to going to the  20  . I have started the first-year books   21The answers ________ my questions about doing sports are very different.A.of B.for C.on D.to