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问题: 一个托福考题

本人在美国准备读高二,今天在美国的家里看到了一到托福考题 Hospital committees____ spent weeks agonizing over with artificial kidney candidate would receive the treatments now find that the decision is out of their hands
A once B that once C have D Once had
答案是 B 请问原因

解答:

Hospital committees____ spent weeks agonizing over with
artificial kidney candidate would receive the treatments now find that the decision is out of their hands
A once B that once C have D Once had

主语:Hospital committees
定语从句:that once spent weeks agonizing over with (that) artificial kidney candidate would receive the treatments
注意在定语从句里又套了一个宾语从句.artificial kidney candidate would receive the treatments
那么, 这个委员会"曾经花几个星期的时间苦恼于试用人工肾的候选人需要接受治疗"

状语:now现在
谓语:find 发现
宾语:that the decision is out of their hands这个决定(需要治疗)已经不受控制了.

为什么不能用A? 因为这里面的两个动词,spent和find之间需要加个and来连接.是需要一个连词才行的.

C与A的解释应该是比较像的.

D就不必说了吧?