---________ is your mother’s birthday?

--- It’s on 1 August.

A．Where           B．When            C．What             D．Which

--        is your mother's birthday?

--It's May 8th.

1. A.
   What
2. B.
   Where
3. C.
   Which
4. D.
   When

---        is your mother's birthday?
---It's May 8th

1. A.
   What
2. B.
   Where
3. C.
   Which
4. D.
   When