We don't know yet which system is going to be the most effective.

And we don't know yet which is going to be the most effective.

We do not know which staff group will be most effective.

The most effective program in the series is the last.

The defense is most effective near the center of the board.

The most effective approach seemed to be moving early and quickly.

"It's probably still just a little too soon to know what are the most effective things for people to be doing."

He called the law "the most effective of its kind in the nation."

Believe it is most effective we have come up with.

It was still one of the most effective in the world.