State the sentence type. Change simple sentences into complex sentences, and compound sentences into compound complex. 1.Some of the earliest forms of writing appeared around 3500 B. E.C.

2.The Sumerians needed to keep track of food, grain and other material used in trade, so they made pictures of the items on clay tables.

3.These pictures were the first form of writing.

4.The clay tables were baked in a kiln; as a result, thousands of them have lasted throughout the centuries.

5.The pictures were created with a wedge-shaped instrument; this type of writing is called cuneiform.

6.Gradually, these pictures came to represent the syllables of the Sumerian language.

7.Rather than clay, ancient Egyptians recorded their writings on leather or on a more fragile material.

8.This fragile material was papyrus, and it later came to be called paper.
9.About eighteen hundred years ago, a Chinese inventor made paper from bark and rags.
10.Chinese books were soon written on a paper; unfortunately, the knowledge of paper-making did not reach Europe for a thousand years.