I apologize if I ____ you, but I assure you it was unintentional (无意的). 
A. offend (冒犯)      B. had offended     C. should have offended      D. might have offended. 

I apologize if I__________you，but I assure you it was unintentional(无意的).?

A.offend                                           B.had offended?

C.should have offended                       D.might have offended?

I apologize if I______you，but I assure you it was unintentional(无意的).

1. A.
   offend
2. B.
   had offended
3. C.
   should have offended
4. D.
   might have offended