问题补充：
-- Oh, my god! I just missed the last bus back home.
-- That’s really bad. I’m sure you it, but you were not in a hurry.
A. could catch
B. had caught
C. could have caught
D. would catch
答案：
A. could catch
B. had caught
(答案→)C. could have caught
D. would catch
解析：考查情态动词。C项could have done意为“本可以做的事但没做”
