Please direct our inquiry to（ ）is in charge of quality control.

Please direct our inquiry to（ ）is in charge of quality control.
A、whom
B、who
C、whomever
D、whoever
【正确答案】：D
【题目解析】：请将我们的询问直接传达给负责质量管理的人。to后面缺少宾语，从句中又缺少主语，故只能填whoever。