20. When rates were raised in 1985, postal service officials predicted they would make further rate increases unnecessary for at least three years. (A) they would make further rate increases unnecessary (B) they would mean that further rate increases would not be needed (C) that it would not be necessary for further rate increases (D) that the increase would make further rate increases unnecessary(D) (E) further rate increases will not be needed 答案是D,为什么C不对?
[此贴子已经被作者于2007-3-6 2:37:48编辑过] |