高考题型提能练(二) Unit 2
Ⅰ.阅读理解
A
阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项。
Two recent studies have found that punishment is not the best way to influence behavior.
One showed that adults are much more cooperative if they work in a system based on rewards. Researchers at Harvard University in the United States and the Stockholm School of Economics in Sweden did the study.
They had about two hundred college students play a version of the game known as the Prisoner’s Dilemma. The game is based on the tension (紧张气氛) between the interests (利益) of an individual and a group. The students played in groups of four. Each player could win points for the group, so they would all gain equally. But each player could also reward or punish each of the other three players, at a cost to the punisher.
