William J. Sidis, was born in 1898. ___1__ father was an American psychiatrist. At the age of six months, William __2____ the English alphabet; he could read and write when he was two. When he was eight years __3___, young Sidis had completed both elementary and high school. At the age of nine, William entered Harvard University.As a ___4___ at Harvard, Sidis displayed phenomenal knowledge in the field of mathematics, ___5__ amazing his professors. He graduated with honors ___6___ age of 16 and became a full professor of mathematics at the university at 19.___7____ story of William J. Sidis unfortunately, does not end happily. The promise ___8__ his early years was never fulfilled. At the age of 26, he was found operating an adding machine ___9___ a store in New York.This brilliant ex-genius died a lonely death in 1943 in a hotel room _10___ New York.1.A. His B. My C. Her D. Their2.A. spoke B. say C. saw D. knew3.A. old B. big C. elder D. young4.A. student B. teacher C. painter D. singer5.A. but B. often C. are D. out6.A. at B. in C. on D. or7.A. The B. A C. One D. An8.A. of B. in C. or D. for9.A. in B. on C. out D. inside10. A. at B. on C. by D. in