I'm expecting an important call.

我在等一个重要电话。

expect
（因为已经安排而）预期,等待，盼望
We were expecting his call yesterday.
我们昨天一直在等他的电话。

I am expecting a visitor.
我在等客人。

A:You're late.
你迟到了。
B:I'm sorry. It was too cold and my car couldn't start. I had to warm it up in the garage with a heater. I tried to call you,but couldn't get a connection.
抱歉，天气太冷了。我的车发动不起来。我不得不在车库里用加热器给汽车加热。我试过给你打电话，但是打不通。
A:Couldn't get a connection?
打不通？
B:Yes. Your number is out of service.
是啊。你的电话停机了。
A:Really? I didn't know. Let me check... You're right.
真的吗？我不知道。让我看看，还真是你说的那样。
B:So I couldn't get through.
所以我打不通嘛。
A:It's a serious problem. I'm expecting an important call. The theater guild is supposed to call me this evening and discuss my play. What will happen if they can't reach me?
那问题可严重了。我正在等一个很重要的电话。戏剧协会今晚会给我打电话讨论wooden剧本。要是他们联系不到我怎么办？
B:Well, the only thing you can do is pay the fee to recover your service.
恩，你唯一能做的就是缴费并开通你的服务。