--Tom, why didn’t you come yesterday?
--I _________ , but I had an unexpected visitor.
A. had B. would C. was going to D. did
--Tom, why didn’t you come yesterday?
--I _________ , but I had an unexpected visitor.
A. had B. would C. was going to D. did
C
was going to 表示“本打算干某事 ”。而would必须跟have才表示过去“本会干某事”。