5. Sorry, I have another call coming in.
抱歉，有新电话打来了。
还能这样说：
Sorry, someone is calling at my mobile phone.
Sorry, a new phone is calling in.
应用解析：
You are another.
你也不例外；你也是。（吵架时用语）
6. I have to say "goodbye".
我不得不说再见了。
还能这样说：
Sorry, I must end the conversation.
Sorry, I have to hang up.
谚语：
Friends stay together, never say goodbye.
友谊永恒。
7. Sorry, it's too late. Can you call again tomorrow morning?
抱歉，时候不早了，你明天早上再打来，好吗？
还能这样说：
I'm sorry, but it's too late. Could you ring up again tomorrow morning?
It's a little late. Why don't we talk about it tomorrow morning?
谚语：
Call a spade a spade.
直言不讳。
8. I'll think about it and call you back to tell my plan soon.
我考虑一下，然后尽快打电话告诉你我的计划。
还能这样说：
I can't tell you my decision at once. Let me think over it carefully then call you back.
I will consider your advice and phone you as soon as possible.
应用解析：
come to think of it 细想一下；
not to be thought of 不能设想；
think a lot of 喜欢，尊敬；
think aloud 自言自语；
think away 想开了