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(单选题)24.（ ） (单选题)23.（ ） (单选题)22.（ ） (单选题)21.（ ） (单选题)What is Dr Daffner’s advice for combating memory loss? (单选题)What should people do when signs of serious memory loss show (单选题)Which memory-related symptom should people take seriously? (单选题)What happens as we become aged according to the passage? (单选题)Why does the author say that one needn’t be concerned about (单选题)Why does Gary Lovett want to get rid of wooden pallets?