in/after

[puzzle]

In / After a few year's time, the mountains will be covered with trees.

Either "in" or "after" is correct in this case, right? Please.

[5jj]

In a few years' time, the mountains will be covered with trees.
After a few years, the mountains will be covered with trees.
After a few years' time, the mountains will be covered with trees.

The first two sound natural to me; the third does not.

[puzzle]

I see. Thanks.

[Hedwig]

In a few year's time, the mountains will be covered with trees.
After a few years, the mountains will be covered with trees.
After a few year's time, the mountains will be covered with trees.

The first two sound natural to me; the third does not.

I'm puzzled. Is year's in your first example a typo, or is that how it should be spelt? If it's correct, would you please explain why?

[5jj]

I'm puzzled. Is year's in your first example a typo, or is that how it should be spelt? If it's correct, would you please explain why?

It's a typo; it should be "years'". Sorry. I've changed it.