The plan is heard _____ so well that we don’t need to make a

The plan is heard _____ so well that we don't need to make any change.
A designed B to design
为什么不选b啊
Hear ……do 不应该还原成 be heared to do

因为是被动态,计划不可能自己设计自己啊.
这里是用过去分词表被动的典型语句.
完整的语句应该是The plan is heard which was designed so well that we don't need to make any change.
which从句代替主语,也可以直接把which was省略.

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