(1)
A)Men can understand things quickly.
B)Men can learn.
C)Men have learned to use language.
D)Men have brains. (2)
A)An ape can make noises.
B)An ape can understand things.
C)An ape can learn words.
D)An ape can make sentences. (3)
A)How children learn to speak.
B)Why apes can learn a few words.
C)Man’s brain helps him to learn to speak.
D)What happens when men speak.
原文：
Man has a big brain. He can think, learn and speak. Scientists once thought that men are different from animals because they can think and learn. They know now that animals can learn—dogs, rats, birds can learn. So scientists are beginning to understand that men are different from animals because they can speak. Animals can not speak. They make noises whey they are afraid, or angry, or unhappy. Apes can understand some things more quickly than humans, one or two have learned a few words. But they are still different from us. They can’t join words and make sentences. They cannot think like us because they have no language.
They can never think about the past or the future. Language is a wonderful thing. Man has been able to build a modern world because he has language. Every child can speak his own language very well when he is four or five -- but no animal learns to speak. How do children learn? Scientists do not really know. What happens when we speak? Scientists do not know. They only know that man can speak because he has a big brain.
In what way are men different from animals?
Which of the following is not true according to the passage?
What do scientists now know?