As the slope down which they moved grew steeper, so progress became more slow.

The slope was growing steeper as he looked at it.

Their slopes grow some of the finest tea in the world.

As the slope grew steeper, she got the better of him.

The slope grew more level as I descended, becoming a series of gentle foothills.

As the slope grew steeper the beast dropped back into a walk.

And as the slope grew steeper, he must make the steps somewhat closer together.

But the slope grew more gradual, and its base was grass-covered.

And if the slopes grew steeper as he went, that didn't seem to faze him in the least.

Down there on those gentle slopes grew maybe fifty million bucks' worth of marijuana.