I called back when I got his message,but there was no______

问题描述:

I called back when I got his message,but there was no______
Aanswer Bnoise Cvoice Dsound

选A
解析:首先要明白这句话的意思:当我得到消息后,我回过电话去,但是那里没人应答
电话没人应答,用answer