—Why didn't you give me a phone call?

—I_______. But nobody answered the phone.

A. do             B. did           C. will          D. have

-Why didn't you give me a call at that time?

-I ________．But nobody answered the phone．

1. A.
   do
2. B.
   will
3. C.
   have
4. D.
   did

?Why didn't you give me a call at that time?

?I ________. But nobody answered the phone.

A. do

B. will

C. have

D. did