4. The world "activity"(Line 2, Para.5) refers to ____.

　　A) sporting activities

　　B) domesticating wild animals

　　C) growing crops

　　D)hunting

　　5. Which of the following best summarizes the main idea of this passage?

　　A) Sporting activities satisfy the desire of modern men to practice hunting skills which the forefathers developed for survival.

　　B) It is farming that brings human into close contact with nature.

　　C) Sporting activities are vital to human existence because they excuse humans from risks and uncertainties.

　　D) It is farming that makes hunting completely out of date and unnecessary.

　　1. D)sporting activities have actually evolved from hunting對應原文第一句Sporting activities are essentially forms of hunting behavior.

　　2. C)a prey對應原文學His killing weapon has turned into a harmless football and his prey into a goal-mouth.

　　3. B)cooperation對應原文They spent over a million years evolving as cooperative hunters.

　　4. A)sporting activities. 出現地點：This new activity involved all the original hunting sequences but the aim of the operation was no longer to avoid starvation. 注意前一句Hunting for sport replaced hunting for necessity.

　　5. A)Sporting activities satisfy the desire of modern men to practice hunting skills which the forefathers developed for survival為本文主旨.