今年4月，我市某中学八年级的一名学生出现高烧、咳嗽、咽喉痛等症状后，陆续有多名学生出现类似症状。经医生诊断，他们患上了同一种传染病，该病通过空气飞沫在人群中传播。

阅读短文，选择正确的答案。

    Mrs. Jones was a teacher. Her house was not far from her school, and she often walked there in the morning. All the students in the school were very young.

    One cold and windy morning in October, Mrs.Jones walked to school. The cold wind went into her eyes and big tears（泪）began to run out of them. She reached (到达) the school, opened the door and went into the classroom.

    It was nice and warm there and Mrs. Jones was happy. But then a small boy looked at her for a while, put his arms a round her and said (说):"Don't cry, Mrs. Jones. School isn't very bad. "

—Oh! Is that your mother?

— Ben, what's your favorite subject, math ________ science?

— Math.