问题描述：
状语从句能用介词加疑问词吗?
例题：This kind of plant can grow best _____ it is warm and rains often.
A.in the place B.where C.in which
为什么?
例题：This kind of plant can grow best _____ it is warm and rains often.
A.in the place B.where C.in which
为什么?
问题解答：
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