______ you say, it is impolite to use her teacup without asking for permission.
【正确答案】 B
【答案解析】考查让步状语从句连接词的使用。whatever与whichever是关系代词,而whenever与however为关系副词。此处应填入引导词作及物动词say的宾语,故排除C、D。题中没有给出从中供选择的对象,A也排除。故只能用B。