作业精灵老师示例：
a. What does the boy do? He is a student. He studies in a school.
b. What does the woman do? She is a taxi driver. She drives a taxi.
c. What does the old man do? He is a farmer. He works on a farm.
d. What does the man do? He is a worker. He workers in a factory.
e. What does the young woman do? She is a nurse. She helps sick children.
f. What does the man do? He is a teacher. He works in a school.
