作业精灵老师示例：
S1：What do you have for breakfast?
S2：I have some bread and milk.
S1：What about lunch and dinner?
S2：For lunch and dinner, I have some rice, vegetables, and meat. What do you have for
three meals?
S1：For breakfast, I have porridge and some eggs. For lunch and dinner, I have some rice
and meat.
