老年人经常玩拼图游戏可以保持认知能力的活跃。

Playing puzzles regularly helps seniors maintain their ___cognitive abilities.

学习一门外语可以增强你的认知能力。

Learning a foreign language can improve your ___cognitive abilities.

玩棋类游戏可以增强儿童的认知能力。

Playing board games can improve children's ___cognitive abilities.