This is an important problem _______ too few social scientists have researched. A. which B. that C. into that D. into which
正确答案:D
intowhich引导的是problem的定语从句which指代probleminto与research搭配
(本解析由学员提供)
This is an important problem _______ too few social scientists have researched. A. which B. that C. into that D. into which
正确答案:D
intowhich引导的是problem的定语从句which指代probleminto与research搭配
(本解析由学员提供)