若一个数的平方根是±8，则这个数的立方根是[ ]
A．±2
B．±4
C．2
D．4
答案：D
— We could have walked here; it was so near.
— Yes, a taxi _____ at all necessary. [ ]
A. wasn't
B. hadn't been
C. wouldn't be
D. won't be
白骑士
