I am a student.You are a doctor.He is a boy,and Mary an astronauts

问题描述:

I am a student.You are a doctor.He is a boy,and Mary an astronauts

I am a student.You are a doctor.He is a boy,and Mary IS an astronauts.
请问是不是在Mary后填空啊,如果是 应该填 IS.
希望可以帮到你!