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       to reach them on the phone, we sent an email instead

 A. Fail  B. Failed  C. To fail  D. Having failed

_________to reach them on the phone, we sent an email instead.

A. Fail            B. Failed             C. To fail          D. Having failed

_______to reach them on the phone, we sent an email instead.

A. Fail            B. Failed             C. To fail          D. Having failed

_________to reach them on the phone, we sent an email instead.

A. Fail            B. Failed             C. To fail          D. Having failed

        to reach them on the phone, we sent an email instead

 A. Fail   B. Failed   C. To fail     D. Having failed

______ to reach them on the phone, we sent an email instead.

   A. Fail                B. Failed        

C. To fail             D. Having failed

 to reach them on the phone, we sent an email instead

     A. Fail  B. Failed  C. To fail  D. Having failed