聽對話，回答第1-3 小題。
1. What are the two speakers?
A. They're teachers.
B. They're engineers.
C. They're students.
2. What is Jack learning now?
A. Science.
B. Law.
C. Art.
3. Why is Mary taking English classes?
A. She thinks it's very interesting.
B. She thinks it's easier for her.
C. She thinks it's very useful.
