单选题 What makes one person more intelligent than another? What makes one person a genius, like the brilliant Albert Einstein, and another person a fool? Are people born intelligent or stupid, or is intelligence the result of where and how you liver? These are very old questions and the answers to them are still not clear.
We know, however, that just being born with a good mind is not. enough. In some ways, the mind is like a leg or an am muscle. It needs exercise. Mental (done with the mind) exercise is particularly important for young children. Many child psychologists (心理学家) think that parents should play with their children more often and give them problems to think about. The children are then more likely to grow up bright and intelligent. If, on the ether hand, children are left alone a great deal with nothing to do, they are more likely to become dull and unintelligent.
Parents should also be careful with what they say to young children. According to some psychologists, if parents are always telling a child that be or she is a fool or an idiot, then the child is more likely to keep doing silly and foolish things. So it is probably better for parents to say very positive (helpful) things to their children, such as "That was a very clever thing you did." or "You are such a smart child."

单选题 Albert Einstein mentioned in the first paragraph is a ______.

单选题 Compared with the words "intelligent" and "brilliant" in the first paragraph, the word "dull" in the second paragraph means ______.

单选题 What should parents do in order to make their children bright?

单选题 A person ______ is more likely to become a genius.

单选题 Which of the following is NOT clear according to the passage?