The idea that there is a body of knowledge to be learnt at school and used for the rest of one’s life is nonsense in a world as complicated and rapidly changing as ours. (Passage 1)

A．The meaning of facial expressions depends on situations.
B．Facial expressions can cause misunderstanding across culture.
C．People from one culture may lack facial expressions because they experience less emotions.
D．Facial expressions may disguise true feelings.

A．Food is no longer a basic need for us, while it was for primitive people.
B．We eat a wide variety of food.
C．We no longer eat fruit that primitive people ever ate.
D．We eat more food than primitive people do.