【B】The Cheater
        Brad was not very good at math. He could not understand the teacher’s explanations. Even when the teacher explained something a second time, Brad still could not understand it. “Never mind,” Brad told himself. “I’m quite good at other subjects. I’ll cheat on the math test, and then I won’t be in trouble.”            The day of the test came, and Brad was lucky enough to sit next to Robert, who was always at the top of the class in math. Brad carefully copied Robert’s answers onto his own exam paper. At the end of the test, the teacher collected the papers and graded them. Then she said, “Well, boys and girls, I’ve decided to give a prize to the student who got the highest grade. It’s difficult for me to decide who to give the prize to, however, because two students, Brad and Robert, got the same grade.” “Let them share it,” one of the other students said. “I’ve thought about that,” the teacher said, “but I’ve decided to give the prize to Robert.”
        Brad was mad when he heard this. He stood up and said, “That’s not fair. I got the same grade as Robert.” “That’s true,” the teacher said. “However, Robert’s answer to question 12 was ‘I don’t know.’ Yours was ‘Neither do I.’”
【題組】63. Why did Brad get a high grade in math?
(A) Math was his best subject.
(B) He copied from another classmate.
(C) The questions were easy.
(D) The teacher explained the questions carefully.