Peter: Look, it's Tom's family photo.
Jim: Is this his sister?
Peter: I don't know. Tom, is this your sister?
Tom: Yes, it's my elder sister. Her name is Linda.
Jim: How about this woman? Is she your mother?
Tom: No. She is my aunt. Her name is Carol. Those are my parents. My father Frank is a doctor
        and my mother Sarah is a professor (教授).
Peter: Who's this baby then?
Tom: It's my cousin. She is Allen and Carol's daughter. Her name is Sally. She is only 3 years old.
Jim: She is so cute. These two people are your grandparents, aren't they?
Tom: Yes, they are. They are both teachers. Their students call them Mr and Mrs Green.

1. Allen is Tom's _______.

A. father
B. uncle
C. aunt
D. cousin

2. Linda is Sally's _______.

A. cousin
B. teacher
C. brother
D. mother

3. Sarah is a _______.

A. doctor
B. professor
C. teacher
D. worker

4. Frank has _______ children.

A. one
B. two
C. three
D. four

5. Tom's grandfather is a _______.

A. doctor
B. professor
C. teacher
D. worker