题目内容
The doctor did what he could ________ the boy, but in vain.A. save
B. to save
C. saving
D. saved
答案:B
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题目内容
The doctor did what he could ________ the boy, but in vain.A. save
B. to save
C. saving
D. saved
| 动词不定式作目的状语。
|