B.
Complete the questions with the correct wh-pronoun.
1.
is your favourite subject? History.
2.
are they running? Because they are late for school.
3.
is your sister? She's ten years old.
4.
drives Peter to school every day? His father does.
5.
does Cathy usually study? In the library?
6.
is the book? It's £10.​