She her hairstyle in her hometown before she came to Chongqing for a better job.
A. would change
B. has changed
C. changed
D. was changing
网友回答
A. would change
B. has changed
(答案→)C. changed
D. was changing
解析：由came可知，她已来重庆了，而改变发型是在来重庆之前，即过去的过去，按理要用过去完成时，但before已经表明紧接着发生的先后两个动作，所以也可用一般过去时，所以选C。