I walked in our garden, Tom and Jim were tying a big sign onto one of the trees.A. which

I walked in our garden, Tom and Jim were tying a big sign onto one of the trees.
A. which
B. when
C. where
D. that

A. whichB. when(答案→)C. whereD. that解析：where引导非限制性定语从句，在从句中作地点状语。句意为“我在花园里散步，汤姆和吉姆也在那里正往一棵树上绑一个很大的标志牌”。

对的，就是这个意思