Megaliths (Fill the gaps)

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
A megalith is a that is made out of big stones.
They appeared in the th millenium B.C., at the end of the .