听力：What do we learn about Ben Carson？

Doctor Ben Carson grew up in a poor single parent household in Detroit. His mother, who had only a third-grade education, worked two jobs cleaning bathrooms. To his classmates and even to his teachers, he was thought of as the dumbest kid in the class, according to his own not so fond memories. He had a terrible temper, and once threatened to kill another child. Doctor Carson was headed down a path of self-destruction until a critical moment in his youth. His mother, convinced that she had to do something dramatic to prevent him from leading a life of failure, laid down some rules. He could not watch television except for two programs a week, could not play with his friends after school until he finished his homework, and had to read two books a week and write book reports about them. His mother’s strategy worked. “Of course, I didn’t know she couldn’t read, so there I was submitting these reports.” He said. “She would put check marks on them like she had been reading them. As I began to read about scientists, economists and philosophers, I started imaging myself in their shoes. As he got in the habit of hard work, his grades began to soar. Ultimately, he received a scholarship to attend Yale University. And later, he was admitted to the University of Michigan Medical School. He is now a leading surgeon at John’s Hopkins Medical School, and he’s also the author of three books.

Q: What do we learn about Ben Carson？

A.He had only a third-grade education.

B.He once threatened to kill his teacher.

C.He grew up in a poor single-parent household.

D.He often helped his.