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 history project on the Twin Towers.
	Derek is doing his history project and he needs help.
Derek:	Dad, (Twin Towers/destroy)?
Father:	They in 2001.
Derek:	by terrorists (they/attack)?
Father:	Yes, they by Al Qaeda terrorists.
Derek:	in the attack (many people/kill)?
Father:	Yes, thousands of people (kill) because the buildings collapsed soon after the attack.
Derek:	Thanks, dad.