◎ 题干
He ______ trees in his garden just now.
[     ]
A. was seen planting
B. was seen plant
C. is seen to plant
D. has been seen to plant
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“He ______ trees in his garden just now. [ ]A. was seen planting B. was seen plant C. is seen to plant D. has been seen to plant …”主要考查了你对  【被动语态】【动名词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。