4.______a reply,he decided to write again.
A.Not receiving
B.Receiving not
C.Not having received
D.Having not received
出自:大学英语1

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块