改错the students were very tired after school ,so they felt happy

问题描述:

改错the students were very tired after school ,so they felt happy

非常累还高兴
应该不高兴:unhappy

those students were very tired after school ,but......

最好的改法:将so改成but.
学生们放学后很累了,但是他们觉得快乐。
如果是将happy改成unhappy。
学生们放学后很累了,所以他们觉得不高兴。
很累了就不高兴吗? 通常做了一件很有意义的事,即使累,心里还是快乐的。这才符合语境。

unhappy

the students were very tired after school ,but they felt happy