Can anyone help me

I am builting a city model for a project , however i messed up with few connected edges.

Here is a link: 0.mk/e7bbe

The grass doesn't look flat , and there are few holes. They aren't huge flaws , and i hope this doesn't need a lot of work.

Can anyone help me?

I can't open your link to see what is going on.

Yep the same here, can't open the link.