These countries use a word similar to billion to mean 10.

Since 1975, the M16 has been used by many different countries.

This country used to think on a very different level.

Many countries have used it at various times since then.

I think more countries should use this type of system.

Many more countries are using cars now than ever before.

"This country could certainly use a few more of those."

It was developed in the late 1950s and is used by around 30 countries.

How would a president and a country used to easy respond to hard?

Not all countries use the same words to describe these groups.