There are many things you could mean by that.
1. It is smart to get in a tree when an animal is chasing you because it is unlikely that they can climb.
2. If you hang by your legs and pull your body up with your abs it a harder workout than just a regular situp.
No. Unlock is a verb.Think of a preposition as anything a bird can do to a tree. A bird can sit IN a tree, it can fly THROUGH the tree, it can be ON a branch, it can sit UNDER the tree, it can fly TO the tree. It cannot sit unlock a tree.
Crow Sit on Blood Tree was created on 2001-08-06.
No it is not safe to sit on a tree of a saddle stand if it is brand new or very old
Tree Sit The Art of Resistance - 2001 was released on: USA: 2001
In trees and around water, they sit around together up in the branches and sckwalk and chew on bits of the tree or look for a hole in a tree to breed in or eat nuts off the tree.
they hold on to the tree
Don't Sit Under the Apple Tree - With Anyone Else but Me - was created in 1942.
Because the other other crows learned that when yousit on a tree's branches then you could see more.
smart casual!
pog log
a lilac tree
If you mean a sit-up as in the exercise, the plural is sit-ups.