题目内容
【题目】The doctor did __________ he can __________ the boy.
A. everything what; save B. everything that; save
C. all; to save D. all; save
【答案】C
【解析】句意:医生尽全力拯救那个男孩。主句谓语为did,不定代词everything和all后跟的定语从句中为避免重复省略了动词do,且通常省略关系词that; 动词不定式作目的状语,选C。
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