题目

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 答案：C 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。

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