单项选择题
Why were rival prison gangs forced into a common exercise yard（）
A．There wasn't anywhere else for them to go. B．They wanted to be together. C．They wanted to be on a videotape. D．The guards wanted to watch them fight.
单项选择题 Many people believe prisoner abuse is （）
单项选择题 Why did the guards shoot at the prisoners（）
单项选择题 The Oakland Internet project costs （）
