Question #38: Which sentence uses the past tense of to study correctly? A. Mark is studying for his math test with Margie. B. Mark will study for his math test with Margie. C. Mark studied for his math test with Margie.

The greatest gift the sumerians gave the world was the invention of writing. the sumerians were wealthy people. they needed some way to keep track of what they owned. they began drawing pictures. they used a reed as a pen. they drew on soft pieces of clay. the soft clay was then dried in the sun. the tablet became a permanent record. later, the sumerian drawings changed into wedge-shaped symbols. this kind of writing is called cuneiform. by putting symbols together, the sumerians could write entire sentences.