Bob's teacher kept telling him that he should work harder,but___didn't help.A.he B.which C.she

问题描述:

Bob's teacher kept telling him that he should work harder,but___didn't help.A.he B.which C.she
D.it

选择D it,it指代前面的一整句话,Bob的老师一直告诉他要努力的学习,但是这并不起作用