问题描述：
robots can even save people _drowning
Robots are developing quickly They are trying to do everything for human bings robots can even save people ＿drowning
“＿”处应填A.from B.in
C.out of D.for
说出理由?
Robots are developing quickly They are trying to do everything for human bings robots can even save people ＿drowning
“＿”处应填A.from B.in
C.out of D.for
说出理由?
问题解答：
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