A. not remember childhood events B. suffer a gradual worsening of cognitive functions C. incur personality and behavioral changes D. spend their last days in a long-term care institution 参考答案:B 答案解析:推论题。A、C和D三项文中都有明确交待。从文中所列举的此病的发展看,从起初的健忘、迷茫到后来的失去记忆、性格、情感及行为上的变化,直至判断、读说写等能力受到影响,可以得出结论患此病的人在认知方面逐渐消