听力资源简介：

ring　
(v.)（门铃、电话等）鸣，响

His phone was ringing. It was his father calling.
他的电话响了，是他爸爸打来的。

answer　 　
(v.) 等待（不挂电话）；保持（状态）

Please answer the phone. It's ringing.
请接一下电话，电话在响。