6. a reply, he decided to write another letter to the personal manager about his job application.
A
Not receiving
B
Receiving not
C
Not having received
D
Having not received
句意为：因为还没有收到回复，所以他决定再写一份工作申请书给人事经理。收到动作发生在谓语之前，所以用完成时。在分词否定形式not在最前面。所以选择C。
此题是非谓语动词判断，首先要明确句意，其次判断缺位单词。
非谓语动词用法。