Your trip up the Nile, the longest river in the world, starts at its mouth, a rich detta with many tributaries that flow into the 1.)_______ Sea. These tributaries merge at the ancient city of 2.)______ Egypt. You continue up the river for about 350 miles and reach the city of 3.)______. After visiting the nearby ruins at Thebes. you sail to Barbar. During this leg of your journey, you pass by the 4.)______ Desert to the east. You then pilot your boat over 200 miles to Khartoum, Sudan, where the Nile divides into the 5.)_______ and the 6.)_____.Continuing down the 7.)______ Nile you eventually reach the Nile's source in Burundi​