He devoted all his efforts __ children.A.to educating B.educate C.education D.to educational

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• He devoted all his efforts __ children.A.to educating B.educate C.education D.to educational
• He devoted all his efforts __ children.A.to educating B.educate C.education D.to educational
• He has devoted himself in education all his life.all his life作什么成分?
• The storm left,having caused a lot of damage to this area.having caused做什么成分如果是伴随状语那么伴随状语也有现在分词的完成式吗它不是表示状语动作和句子谓语动作同时发生吗现在分词完成式不是表示动作先发生吗那能用现在分词的完成式做结果状语吗?用了完成式就表明这个状语动作先发生,那还叫结果吗?