题目内容

The doctor did everything they could        the dying boy’s life, but they failed.
A．saving               B．to save              C．saved
B

试题分析：句意:医生做所有他们能做的事来救这个即将死去的孩子的生命，但是他们失败了。在这句话中they could 是一个定语从句，修饰先行词everything。从句中省略了动词do；动词不定式在这里做目的状语，表示为了…。故选B。
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