How long does it take to go to school中的it指代什么

How long does it take to go to school中的it指代什么 How long does it take you go to school? “How long does it take to get home?”里面it指代什么? How long does it take to you to the school? How long does it take you to get to school How long does it take Tony to get to school. How long does it take you to get to school? How long does it take you to go to school?Only five minutes_ How long does it take you to go to school from home? How long does it take you to go to school ,你到学校花 How long does it take you to go home from school?A How long does it take ____ to your school by bus A.you go B.