Look at those trees,___the leaves have turned black. A.that B.which C.of which D.in which

Question

为什么选C，

Answer 1

答案是：C, of which，非限制性定语从句。the leaves of the trees have turned black, of 提前

Answer 2

选择C
of which 相当于whose 由题意可理解，树的叶子已经变黑了。
in which相当于where.

Answer 3

of which本回答被提问者采纳