单项选择题
A. The First Ball Games B. How Egyptian Children Played Games C. Egyptian Sports D. The Beginning of Sports
A. they have developed advanced forms of transportation B. they have learned how to process sea water for drinking C. their body temperature can vary considerably D. their shelters and clothes help them to adapt themselves to the environment
A. A Flexible Working Schedule B. A Staff Shortage in Maya Design C. A Pittsburgh-based Working Place D. A Company Taking Care of Young Parents