We would like to express our sincere appreciation to all the people who helped shape this book. First of all, we would like to thank the Beginner, Beginner, Foundation and Pre-Intermediate Group test authors between 2000 and 2005. Special thanks are also due to Robert West, who meticulously edited and edited the material in the book. We also thank Steve Riva, Beth Dogan, Gary Conlan, and Patricia Bilikmcn for their invaluable proofreading. We would also like to thank Nurcihan Kank, who formatted the material, and Umut Kahraman, who created a software program that allowed us to prepare vocabulary tasks.