But making advertising buys in each market has become increasingly difficult.

But in the past few years the market has become much more efficient.

Since then, however, the market has become much more volatile.

No matter how big a market the Internet may become, it is not going to develop fully overnight.

"But we have been surprised to see how big the domestic market has become."

"We still think there's good value, but the market is becoming concerned with licensing costs."

Little did she know just how large that market would become.

The national economy and the market have become too intertwined.

Since then, the market has become weaker for all but the best free agents.

But the adult market for the drugs has become saturated.