问题补充:
A: You look very nice in your new dress today.
B: Oh, really? I it when it was on sale.
A. buy
B. bought
C. have bought
D. will buy
答案:
A. buy
(答案→)B. bought
C. have bought
D. will buy
解析:句意:今天你穿这件连衣裙看起来很不错。——哦,真的吗?我是在它减价处理的时候买的。结合语境可知下文描述的是过去某时进行的动作,故用一般过去时态,选B。