从方框中选择正确选项，完成短文，并将其字母序号写在后面的空格内。

Tom did not like doing his homework, because he liked to do some things after school. And his teacher always a lot of mistakes (错误) in his homework.

Then one day, his math teacher at Tom's homework and saw that his answers were right. He was surprised(惊奇). The next morning before class, he Tom to come to his office and to him, "All your answers are right this time. Did your father you?" Tori's father often helped him with his hone work, this time he didn't help Tom because he at home. So Tom answered, "No, Sir. He was busy last night, so I to do it myself. "