求教，thanks

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Charles6246

楼主

发表于 2009-7-19 20:26:00 | 只看该作者

求教，thanks

When rates were raised in 1985, postal service officals predicted they
would make further rate increase unnecessary for at least three years.

C.that it would not be necessary for further rate increase.
D.that the increase would make further rate increase unnecessary.

请问为什么不选C，D好在哪里？谢谢

[此贴子已经被作者于2009/7/19 20:28:10编辑过]