And once that happened, once this material was in Latin, it formed the basis for mathematics textbooks for almost 600 years.

Almost all countries in the more developed regions reported the number of deaths by cause, sex and age at least once during the period under consideration.

She came at once.

Shut it down at once.

Sometimes, it's all at once.

At least once a week.

Please come back at once.

I telephoned her at once.

You'd better leave at once.

I'll be there at once.

Yes, I'll come at once.

The fire was extinguished at once.

Well, at least, we did once.

You had better leave at once.

Send for the doctor at once.

You'll have to start at once.

You had better go at once.

You'd better go home at once.

Send for a doctor at once.

Must I go there at once?

All at once, he spoke out.

Jessie accepted the invitation at once.

I must start working at once.

Look at this, 2,000 people almost, on Copaxone.

He realized at once what had happened.

The doctor decided to operate at once.

You'd better go to bed at once.

You'd better go to bed at once.

A doctor was sent for at once.

You had better do it at once.

I want you to come at once.

The baby went to sleep at once.

You can't do two things at once.

You can't do two things at once.

All at once, I heard a cry.

All at once they began to laugh.

He put on his hat at once.

I can't do two things at once.

You need not do it at once.

I almost die laughing at the things he says.

And once they achieve that level, once they've written at that level, they can never go back.

3. Expresses once again its grave concern at

You'd better have your hair cut at once.

And they turned at once and walked away.

We must carry out the plan at once.