问题
选择题
In the forest we observed some trees ____the leaves were black with disease.
A．where
B．of which
C．in which
D．whose
答案
B
of which引导定语从句
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In the forest we observed some trees ____the leaves were black with disease.
A．where
B．of which
C．in which
D．whose
B
of which引导定语从句
