阅读下面短文，从每题所给的A、B、C、D四个选项中，选出一个能填入文中相应空白处的最佳答案。

    On the first day of school, the new teacher had a look at the name list of students. How pleased she was!

    Guess what she 1? After each student's name, there was a number 2 138, 140, 154 and so on. "3 these high IQ (智商) students." She thought to herself. "They've given me a wonderful 4!"

    As a result, the 5 teacher worked harder with this class than with her other classes. She 6 some new teaching ways. She thought these 7 would cheer the students and hold their 8. She was right. It 9 out well! The class did much better than any of her others.

    Later, however, she found out the 10 the number after each name did not mean the IQ, but the number of his or her clothing box in the school.