He is very humorous, while his brother is rather serious. That is ___their difference lies. A．why B．...
2023-01-10 20:10:57 24次 宁夏09-10学年高一下学期期中考试（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
He is very humorous, while his brother is
rather serious. That is ___their difference lies.
|
A．why
|
B．where
|
C．how
|
D．when
|
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