the students in our class work much harder at english than __in their class.AthatBthese Cthose

the students in our class work much harder at english than __in their class.AthatBthese Cthose
the students in our class work much harder at english than __in their class.AthatBthese Cthose

the students in our class work much harder at english than __in their class.AthatBthese Cthose
C
首先因为前面的students是复数 所以不选A
其次 these 是指定的学生
而此题没有指定 比哪些学生学习努力 只是泛泛的说

C代the students复数

those
those代指前句里的the students，因为是那个班的学生，因此不用these