老师给其他同学更多时间完成作业，这很不公平。

The teacher gave other students more time to finish their homework, which was ___unfair.

老师只给某些学生额外时间答题是不公平的。

It's ___unfair that the teacher gave extra time only to some students.

老师偏袒某些学生是不公平的。

It's ___unfair for the teacher to favor some students over others.