他非常安静，像个影子一样到处跟着我。
He was so quiet and followed me everywhere like a ___shadow.
下午，那栋高楼在街道上投下了长长的影子。
The tall building cast a long ___shadow across the street in the afternoon.
墙上投射着一个人的影子。
A ___shadow of a person is projected on the wall.
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