2012-11-16 14:38 自考365
单选题
1.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
答案解析: into which引导的是problem的定语从句。which指代problem,into与research搭配。
自考365
2022-01-16
自考365
2022-01-16
自考365
2022-01-16