----Your coat fits you well.----Thank you. I ______ it when I wa

----Your coat fits you well.----Thank you. I ______ it when I was on vacation.
A、have bought
B、buy
C、bought
D、has bought
【正确答案】：C
【题目解析】：根据when引导的时间状语从句的was on vocation可知，主句要用一般过去时。