Jack’s father kept telling him that he should work harder,but____didn’t work.

问题描述:

Jack’s father kept telling him that he should work harder,but____didn’t work.
A:he B:it C:she D:which

答案B
由于有了but,这是并列连词,所以后面需要完整的句子
didnt work这是谓语,需要主语,
由it充当
it是代词,指代前面的句子,就是这个现象
肯定对哦
jack的父亲一直告诉他要努力读书,但是,这似乎不起作用