Don’t respond to any e-mails personal information, no matter how official they look.
A. requested
B. request
C. requesting
D. to be requested
网友回答
A. requested
B. request
(答案→)C. requesting
D. to be requested
解析：考查分词用法。因为e-mails与request构成主动关系，使用现在分词表示。Requesting personal information作定语修饰名词e-mails.