单选题_________a reply  he deci

问题补充：

单选题_________areply,hedecidedtowriteasixthletter.A.Not receivingB.Not to receiveC.Not having receivedD.Having not received

答案：

C解析非谓动词表示的动作如果发生在句子谓语动词表示的动作之前，非谓语动词就要用完成体。