Choose the best answer. (根据短文内容，选择最恰当的答案。)
Andrew Engel was puzzled. He was sitting in
class, but had no idea what the other students were talking about. He had done
his homework, paid attention to lectures. and taken notes, but nothing was
familiar." Everyone is se much cleverer than I am, " he thought. It
was a strange feeling, as he was always a good student in high school.
He felt even more puzzled a few days later.
He got lost on his way to his favourite cinema. What's worse, he began having
trouble finding the right words when speaking. He asked, "What's for
dinner, Mum? "after he had just eaten. Poor Andrew, he was only 15！
His parents were worried and took Andrew to
see a doctor. A brain scan(扫描)made it
clear: Andrew had a malignant brain tumor(恶性脑肿瘤). It
was pressing on the part of the brain that makes new memory. He should be operated
on as soon as possible. Andrew was scared！
Doctors removed the tumor, but Andrew's
memory was still poor. He was told he would probably never go back to school. Andrew
was eager to enter a university, but it seemed that his dream wouldn't come
true.
"Even
though they told me this, I knew I wanted to go back to school, "Andrew
said." I wanted to get my memory back. "
Andrew began to audit(旁听)an English class at a nearby school. In class, he took notes
carefully and read his notes several times a day, then typed them again and
again. He studied twelve hours a day, seven days a week. He worked ten times
harder than other students. In 2007, at age 29, he graduated from a local
university. Six months later, Andrew found a job.
