下列说法中正确的是[ ]
A.任何数的平方根都有两个
B.一个正数的平方根的平方是它本身
C.只有正数才有平方根
D.正数的平方根是正数
答案：B
Really great people always see the best in others; it is the little man who looks for the worst and finds_________.
A．one
B．it
C．that
D．them
