In the forest we observed some trees the leaves were black with disease.A. whereB. of whic

发布时间：2020-08-17 13:14:05

In the forest we observed some trees     the leaves were black with disease.
A. where
B. of which
C. in which
D. whose

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A. where
B. of which
C. in which
D. whose
解析：of which引导定语从句 
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