It's a major subject.

It's a big issue.

'It's no business of mine.'

Mathematics is a good subject.

It's a very urgent matter.

It's a very difficult issue.

It's a very delicate subject.

Humor is serious business.

It turns out that oil spill is a mostly white conversation, that cookout is a mostly black conversation.

This is a very serious talk.

That's a subject that we want to dive into.

That is an internal affair of this country.

This is a matter of the utmost importance.

Tom is an expert on the subject.

Redistribution of wealth is a controversial subject.

Humor is no laughing matter.

And this is still a very active subject.

In Mali, rape is a taboo subject.

It's not a suitable topic for discussion.

But justice is a tougher standard than charity.

Because this seems like a national issue, but it is not.

So it's something we need to focus on.

Papazzang is one of the most enthusiastic bloggers on this issue.

Marriage isn't a subject that interests young people.

That's a subject I know nothing about.

It is a subject I do not care to talk about.

That's my business.

This subject is taboo.

It's kind of a recent topic, at least in the U.S.

My subject today is learning.

My favorite topic is shortcuts.

This topic is also old.

That ship has sailed.

This doesn't concern me.

This is none of my business!

French is my favorite subject.

This subject is extremely controversial.

Worthy or not, my life is my subject, and my subject is my life.

The issue sparked an intense debate in Malaysia which is a Muslim majority country.

And this is a subject that I would love to think about together.

Exactly which island in the Bahamas this corresponds to is unresolved.

In these states, the death penalty statute was struck down by court ruling.

He wrote a paper on this.

Let's move now to a more painful subject.

But my subject is national security.