48. According to the article, what should people do when they grow older?
(A)They need to eat food with protein.
(B)Exercise more makes them stronger.
(C)They need to go to bed early.
(D)Mild stress makes them healthy.
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統計: A(71), B(226), C(101), D(1426), E(0) #666943
統計: A(71), B(226), C(101), D(1426), E(0) #666943