It is great scenery when you see the trees on the

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答案选 B of which
首先,这是一个复合句,主句是：It is great scenery when you see the trees on the road in the late autumn
定语从句是：_____the leaves all turn yellow.
很明显,the trees是先行词 定语从句中缺少的是定语 ,即：the leaves of the trees 树的叶子
of 是介词 后面缺少宾语 指物 所以用 which
所以答案就是 of which
======以下答案可供参考======
供参考答案1:
B先行词是：the trees 从句是：of which the leaves all turn yellow.还原的话就是：The leaves of the trees all turn yellow.
选whose 的话，应该是whose leaves,不能有the.
供参考答案2:
B.of which
供参考答案3:
whose leaves 没有the
the leaves of the trees 说得通
that加上去看似是个强调句 实则成分残缺
请追问B of which the leaves all turn yellow.