阅读理解。

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