--What time do you go to bed?   --           about a quarter to ten.

--What time do you go to bed?   --           about a quarter to ten.

A．For              B．In                C．At               D．On

What time do you go to bed ________.

1. A.
   in the night
2. B.
   at the night
3. C.
   in a nighyt
4. D.
   at night

--What time do you go to bed?  

--           about a quarter to ten.

1. A.
   For
2. B.
   In
3. C.
   At
4. D.
   On