It's up in the air.

尚未确定。

Excuse me for a moment.

失陪一会儿。

You have my word.

我保证。

I'm sick and tired of your complaints, be quiet.

我已经听厌了你的抱怨，别说了。

It's a pain in the neck having to meet them at the airport.

必须到机场去接他们，真讨厌。

You're sure of passing the exam if you work hard.

只要用功，主汪定能考及格。