作文中that和which 的不同，请高手指点！！ 谢谢

ifcan1314

All candidates have their own skills, ability and aspirations that fit specifle flelds of study.

这是我写的一句话， 外教批改把that 改为了which

All candidates have their own skills, ability and aspirations which are appropriate for  specifle flelds of study.

我不明白的地方是，外教为什么要把that换成which  ，请指教 ！！  谢谢  

ifcan1314

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ifcan1314

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