And then his concern changed to wonder-and to fear.

It's a change in medium, but the concerns about representation haven't changed at all.

Survivalists' concerns and preparations have changed over the years.

And their concerns have changed surprisingly little over the years.

The Apt's head jerked up: his concern changed to a scowl.

But in the intervening years, concern about terrorism changed everything.

"But current concerns about the mail may change this."

The concerns of today's big firms have changed.

My concern hasn't changed, but decisions get made.

The world has changed and the citizens' concerns and needs have changed.