问题
单项选择题
（） an answer, they decided to send an express telegram to them.
A．Received not
B．Having received not
C．Not having received
D．Not received
答案
参考答案：C
解析：
“没有收到回复”这一事件发生在决定发急电之前，其动词(这里是一个动词的完成式)的-ing形式作主语表主动，对这个主语的否定只能置于其前加not。
）