未知题型 Older people are generally advised to _____.(A) keep fit by going in for physical activities(B) keep mentally active by challenging their brains(C) maintain mental alertness through specific training(D) maintain a balance between individual and group activities

未知题型 According to Fozard's argument people can make

未知题型 People who are cognitively healthy are those _____.(A) who can remember large amounts of information (C) whose minds are alert and receptive(B) who are highly intelligent (D) who are good at recognizing different sounds