Donald was not very good at math. He couldn't understand the teacher's explanations. Even when the teacher explained something a second time, Donald Still couldn't understand it. "Never mind." Donald told himse1f, "I'm quite good at other subjects. I'll cheat in the math exam to get a good grade, then I won't be in trouble. " "I'll sit next to the boy who does best in math," he thought, "and copy down this answers." The day of the exam came, and Donald sat next to Tommy, who was always at the top of the class in math. Donald carefully copied Tommy's answers onto his own exam paper. At the end the exam, the teacher collected the papers and graded them in time. 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 I'll give the prize to one of them." The students were surprised when they heard this. They said, "That's not fair. They got the same grade." "That's true." the teacher said, "However, Tommy's answer to Question 18 was 'I don't know' while Dona1d's was 'Neither do I ' ." We can infer<)  _  .
Donald may study hard at math the teacher may criticize  Donald Tommy may share the prize with other students Tommy may not study hard