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

题目详情
Bob's teacher kept telling him that he should work harder,but___didn't help.A.he B.which C.she
D.it
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答案和解析
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