Question

---Dad, ______my pencil case in the drawer?
---Sorry, I ______ know.

1. A.
   is; am not
2. B.
   do; don’t
3. C.
   is; don’t

Answer 1

C
上句为一般疑问句，my pencil case为单数，所以用is，Idon’tknow.我不知道。所以选C 。