Question:
Peter Griffin often pokes fun at Chris, because he enjoys doing it.

he
Answer:
Peter Griffin
Question:
The doctor told Susan that she had been busy.

she
Answer:
The doctor
Question:
Kim Kardashian has already followed in the steps of Demi Moore and getting divorced, because she also could not come to terms with her husband.

she
Answer:
Kim Kardashian
Question:
Pizza hut pizzas are tastier than Papa John pizzas because they give more ingredients and cheeses.

they
Answer:

Pizza