The growth of the railroads led to abilition of local times，which was datermined by when the sun reached the observer‘s meridian and differing from city to city，and to the establishment of regional times
（C）which were datermined by when the sun reached the observer‘s meridian and differing
（E） datermined by when the sun reached the observer‘s meridian and differing
答案是e，c为什么不对啊？画线部分应该修饰local times，e好象有歧异，determined by ~~可以理解成修饰growth，疑惑！
第二个were的省略错，第一个were是被动语态的aux v，第二个were是过去完成时的aux v，风马牛不相及，怎么能省略第二个were呢？而且深究下来C的后半部分是which （were） differing，时态不对。
这种题目在CD上已经讨论过无数遍了，你可以通过大全题号，885题号或OG题号去查询。可以快速获得答案和拓宽思路，极其有好处。
http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=22310&page=1
http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=24247&page=1
good luck。
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