an answer from her husband, Emily decided to send him another email.
A. Not having received
B. Having not
C. Receiving not
D. Not receiving
网友回答
(答案→)A. Not having received
B. Having not
C. Receiving not
D. Not receiving
解析：考查非谓语动词的完成式。当非谓语动词的动作发生在谓语动词之前 时，非谓语动词用完成式。“未收到丈夫的回信”与“决定再发一封”是前因后果的关系, 因此“未收到”用完成式。