It's a major subject.

It's a big issue.

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

'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.

I have to learn a language.

He wrote a paper on this.

Let's move now to a more painful subject.

This is a very serious talk.

Learning English is hard work.

It's fun to learn a foreign language.

Learning a foreign language is interesting.

He knows how to learn a language quickly.

It was a club to learn English and to learn computers and the internet.

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.

We have an important matter to discuss.

Redistribution of wealth is a controversial subject.

Jokes are no laughing matter.

Humor is no laughing matter.

Tom wrote a paper on that subject.

You should learn how to use your dictionary.

Learning without thought is labor lost.

It's impossible to learn English in a month.

One of my dreams is to learn Icelandic.

Urgent business discouraged him from going on a picnic.

And this is still a very active subject.

In Mali, rape is a taboo subject.

We must study the affair as a whole.

I have a complicated matter I want to discuss with you.

It's not a suitable topic for discussion.

Aristotle said, We should seek only so much precision in each subject as that subject allows.

a KDE program to learn the alphabet

Now he had a reason for learning variables.

He wants to learn how to ride a unicycle.

I want to learn to sound more like a native speaker.

Learning vocabulary is a neverending struggle.

Fadil should try to learn a little Arabic.

But justice is a tougher standard than charity.