题目

You were very impolite to him, for ______ you should make an apology to him, I think, A. this                      B. which C. what                      D. that   答案： B 此题属于“介词+关系代词”引导的定语从句。先行词指物时关系代词用which，指人时用whom。

查看本题答案和解析