The first slab of stone was amazing enough. Beautifully carved and preserved for nearly 2,000 years, the piece was 1 an exciting discovery. But then American archaeologist Timothy Kendall’s team, working in the African country of Sudan, discovered a second slab. And then another, and another, until there were 25 in all. The workers laid them in the sand 2 When the pieces were 3 they formed a beautiful picture: stars set against a blue sky, and crowned vultures flying into the distance.
The importance of these stones goes far beyond their beauty, however. Kendall and others hope to help unlock the mysteries of an ancient African civilization called Nubia.  Many people have never heard of Nubia, but that’s because researchers have tended to ignore this ancient African land and focus 5 on its neighbor to the north, Egypt.
Why have archaeologists waited until now to study Nubia closely? Although Sudan has more pyramids than Egypt, it was considered a “no man’s-land” until recently. This view came partly from the first Europeans to study the area. They found Egypt to be less 6 isolated than Sudan. 7 Egypt proved to be so rich with artifacts that there was little reason to search farther south along the Nile River.
 Many researchers viewed Nubia as an offshoot of Egyptian culture rather than a unique civilization separate from Egypt. They didn’t 9 was capable of producing high civilization. But that view is changing: a Nubian history museum recently opened in Egypt, 10
Kendall 11 his discovery will help convince the world of Nubia’s importance. The slabs he found may have 12 the ceiling of a passageway that led to a temple dug into a hill known as Jebel Barkal. From a distance, the hill looks like a crown with a cobra coiled around it, which is an ancient symbol of royal power. Kendall thinks that’s why the temple at Jebel Barkal may have been used as a sacred place to hold royal crowning ceremonies. Kendall’s next big goal is to clear a path through the huge boulders 13 and find out what’s on the other side.
For now, though, some secrets of ancient Nubia may remain buried under the rocks of Jebel Barkal. Kendall and his team aren’t planning to start digging again for several years. When they finally break through the rubble, what will they find? Jeweled crowns? Royal thrones? 14 Kendall’s hunch is right, then the Jebel Barkal discovery will be a crowning achievement in the study of Nubian culture. 
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The writer is considering adding the following phrase to the end of the preceding sentence (placing a comma before the word “which”):
which may be as old as Egyptian civilization
Should the writer add this phrase here?CorrectIncorrect
Which choice should the writer use to create the clearest and most logical transition to Paragraph 4?CorrectIncorrect
The writer wants to emphasize that scholarly interest in Nubia has increased dramatically. Given that goal, which of the following is most appropriate?CorrectIncorrect
In order to explain why Kendall’s team was not able to enter Jebel Barkal, the writer is considering adding the following sentence to the essay:
It appears, however, that about 1,800 years ago an earthquake and rockslide closed the passageway.
If added, this sentence would most logically be placed after:CorrectIncorrect