For example:

A: What can I do for you?能帮助您吗？

B: Can I go in to see Mr. Lin?我可以进去见林先生吗？

张先生正在等你。

Mr. Zhang is waiting for you.

Mr. Zhang is expecting you.

For example:

A: Mr. Zhang is waiting for you.张先生正在等你。

B: Yes. I hate to be late, but I could not find the building.

我知道，我很讨厌迟到，但我找不到你们的办公大楼。

林先生知道你今天早上要来拜访他吗？

Is Mr. Lin expecting your visit this morning?

For example:

A: Is Mr. Un expecting your visit this morning?

林先生知道你今天早上要来拜访他吗？

B: No, he isn't.不，他不知道。

我要等很长时间吗？

Will I have to wait long?

For example:

A: Will I have to wait long?我要等很长时间吗？

B: No, my manager should be able to see you in a minute.

不，我们经理应该很快就能见你。

曲先生正在开会，是急事吗？

Mr. Qu is having a meeting now. Is it urgent?

A: Mr. Qu is having a meeting now. Is it urgent?

曲先生正在开会，是急事吗？

B: Yes, it's a very urgent matter.是的，是紧急事情。