—Have you found out the telephone number I need？

—Yes，but ______，I have sit here for nearly a half hour.

A.for finding it out                                           B.to find it out

C.for finding out it                                           D.to find out it

—Have you found out the telephone number I need？

—Yes，but ______，I have sit here for nearly a half hour.

A.for finding it out　　　　　　　　　　 B.to find it out

C.for finding out it　　　　　　　　　　 D.to find out it

—Have you found out the telephone number I need？

—Yes，but ______，I have sit here for nearly a half hour.

1. A.
   for finding it out
2. B.
   to find it out
3. C.
   for finding out it
4. D.
   to find out it