922. 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
解释上说C错是因为it无指代, 可it可以做形式主语啊.
C还有其他的错误吗?
谢谢大家. | 
