Charles did what he could____ the drowning man, although he himself was in danger.A.rescue B.rescued Cto rescue D.rescuing. what引导什么句子

Charles did what he could____ the drowning man, although he himself was in danger.A.rescue B.rescued Cto rescue D.rescuing. what引导什么句子
Charles did what he could____ the drowning man, although he himself was in danger.
A.rescue B.rescued Cto rescue D.rescuing.
what引导什么句子

Charles did what he could____ the drowning man, although he himself was in danger.A.rescue B.rescued Cto rescue D.rescuing. what引导什么句子
to 为了,表示目的
Charles尽其所能救那个溺水的男人
what 引导宾语从句