--I saw Betty go to Grandpa Li's home just now. --Yes. She’s often seen _________ the old man with the housework.. A: help B. to help C. helps D. helped-高中英语-n多题

◎ 题干

--I saw Betty go to Grandpa Li's home just now.
--Yes. She’s often seen _________ the old man with the housework..
A: help B. to help C. helps D. helped

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◎ 解析

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◎ 知识点

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