问题描述：
The doctor did all he could so that he _____ save the soldier’s life.A.might B.must C.had to
The doctor did all he could so that he _____ save the soldier’s life.
A.might\x05 B.must C.had to\x05D.was able to
The doctor did all he could so that he _____ save the soldier’s life.
A.might\x05 B.must C.had to\x05D.was able to
问题解答：
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