定语从句改错：ThisisthemostdifficultmathsproblemwhichIhavedone.
2021-08-13 60次 反馈错误 加入收藏 正确率 : 100%
题目内容：
定语从句改错：This is the most difficult maths problem which I have done.
优质解答
which ------改写成that就是了,因为形容词,序数词和顺序词（next , last）被定语从句修饰是,我们用that,不要which.
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