do you go to school, on foot or by bus?

       do you go to school, on foot or by bus?

A．When            B．Why             C．How             D．What

       do you go to school, on foot or by bus?

1. A.
   When
2. B.
   Why
3. C.
   How
4. D.
   What

--Do you go to school by bus or by bike?

-- ________．I go to school on foot and it's good for my health．

A．Neither            B．Either            C．Both              D．None