河南成教 / 当代英语语法概论
正确率：100%
21[单选题]
Helen was much kinder to her youngest child than she was to the others, ( ) , of course, made the others jealous.
A.who
B.that
C.which
D.what
Helen was much kinder to her youngest child than she was to the others, ( ) , of course, made the others jealous.
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