有一个逗号加一个空格,如果空格后的句子还有逗号,那么就该判断该句是非限制性定语从句,填 which,如果空格后句子没有逗号,那么就不该填which 可能会用到it, 或者 and. 但肯定不能用到However. 举例: The animal, __which___ we are familiar with, is called snake. 有两个逗号 She is very kind, __and___ she is very intelligent. 有一个逗号