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题目内容
（商丘师范学院-基础英语1）
(单选题) Helen was much kinder to her youngest son than to the others , , of course ,(本题1.0分)
A、 who
B、 that
C、 what
D、 which
A、 who
B、 that
C、 what
D、 which
参考答案
