第二节(共5小题；每小题2分，满分10分)
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项．选项中有两项为多余
选项．
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 live? 71
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 arm muscle． 72 Mental exercise(done with the mind) is particularly important for young children．Many child psychologists think that parents should play with their children more often and give them problems to think about． 73
