Don’t respond to any e-mails personal information, no matter official they are.
A. requested, how
B. requesting, how
C. requesting, what
D. requested, what
网友回答
A. requested, how
(答案→)B. requesting, how
C. requesting, what
D. requested, what
解析：考查非谓语动词及让步状语。requesting personal information作定语修饰e-mails，关系为主动，故用现在分词；后句意为：无论他们多么的正式。故用no matter how，选B。