题目内容：

[单选题]A．

My name is Philip．Now I live in Beijing．On Sundays my father often takes me to movies． My favourite movies are action movies． My father likes them， too． Many young people like this kind of movies， because they are exciting． My good friend， Jim likes thrillers best． I don-t like thrillers． I think they are scary and boring． Jim likes Beijing Opera， too． And he wants to be a Beijing Opera artist．( )21． When does Philip often go to movies with his father?

A． Sundays

B． Birthday

C． Festival

D． Mondays