Don’t mess up the files.

Why has she not brought her books?

I should have at least something.

He was born at 5.

That’s where he was standing.

If he had studied well, he would have been a doctor today.

We should not talk callously to those working under us; after all, they are working so hard for us.

It’s very humid today.

How long can you hold out without oxygen?

Why have you not done your homework?