My brother is very important. At least he thinks he is. ✬

Chestnuts have to be boiled for at least fifteen minutes. ✬

We must sleep at least eight hours a day. ✬

You should brush your teeth at least twice a day. ✬

It'll cost at least five dollars. ✬

The trip will take at least five days. ✬

The trip will take at least a week. ✬

The movie is worth seeing at least two or three times. ✬

It'll take at least one hour to go there. ✬

These books are worth reading at least once. ✬