——Who's singing in the next room? Is it Lucy?
——It       be her. She has gone to New York.

下列运算结果正确的是（       ）

提示词：classmates and friends ,teacher, subjects, school activities.

要求：1）短文需包含以上所有信息，可适当发挥。

      2）语句通顺，意思连贯，书写工整。

      3）文中不能出现本人的真实信息。

      4）字数要求在80左右，开头和结尾已给出，不计入总词数。

Three years' school life

    I'm a student in Grade Nine. I will leave my junior high school after I finish the exam.

   ……………………………………………………
    In a few months I have to say goodbye to my school. I feel sad about it .I love my school and all my teachers. I'll never forget my three years' school life.

如图是同种生物4个个体的细胞示意图，其中A对a为显性．B对b为显性，哪两个图示的生物杂交后，后代出现4种表现型、6种基因型（　　）