The doctors tried their best ____ the dying boy's life,but they failed at last A.to save B.save

The doctors tried their best ____ the dying boy's life,but they failed at last A.to save B.save
C.saving
英语人气:692 ℃时间:2019-08-21 20:58:31
优质解答
try one's best to do sth,选A
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