1\ She her hairstyle in her home town before she came to Chongqing for a better job. A will change

B has changed C had changed D was changing
2\ John asked Kate if she the next day.
A left B had left Cis going to leave D was going to leave
3\ What to the owner of the shop when the fire ?
A happened ,broke out B took place ,went out C happened,was taking place
D took place ,was happening
4\ I English for exactly six years by this October.
A will hace learned B am learning C will learn D have learned

1B，这句有个时间点的提示语''before",一般句子出现这个词是表示一般过去时或现在完成时，结合给出的4个选择，只能选B、
2D，主句的时态势一般过去时，而从句中表达的又是将来时the next day，所以只能是过去将来时、
3A，主语作为“事情发生”时，用it happen...就可以了，而提问就直接用what 开头就行，“发生火灾”用break out.
4D, 主句也是有时间点的提示语for+时间段，一般是用于现在完成时，所以用have+分词、

因为其他三个都不对。 would change 表将来，不合适 has changed 现在完成时显然不对，至少应该是 had changed，过去完成时才行 was changing 表示过去正在发生的事，显然本句不是这个意思。 可以信服吗？或者还有什么疑点，说出来。