Choose the correct
alternative to fill in the blanks:
Allan: Is Paul busy?
Pete: No, I don't
think he is, but he is not here. He ___________ home before I got here.
Allan: Really? If I
___________ time, I __________ him.
a. gone/ had/ called
b. had go/ had have/ would call
c. has gone/ has has/ has call
d. had gone/ had had/ would have called