[解析]
细节理解题。
30. A。根据文中关键句"My family has five people."可知迈克的家里有五口人。故选:A。
31. B。根据文中关键句"He likes swimming."可知迈克的爸爸喜欢游泳。故选:B。
32. B。根据文中关键句"My mother teaches music in a school."可知迈克的妈妈在学校里教音乐。故选:B。
33. C。根据文中关键句"My father works in a post office."可知迈克的爸爸在邮局工作。故选:C。
34. B。根据文中关键句"My grandma looks after her at home."可知迈克的奶奶在家里照看安。故选:B。