--What are you doing, Cathy?

--I'm ________ my cat. I can't find it.

1. A.
   looking for
2. B.
   looking at
3. C.
   looking up
4. D.
   looking after

?What are you doing,Cathy?　　

　　?I'm ____ my cat.I can't find it.

　　A.looking for　　B.looking at

　　C.looking up　　D.looking after