— I hear that you have won the lottery.  

— Not once in my life ______ until now. [ ]

A. good luck turned up

B. turned up good luck

C. up turned good luck

D. has good luck turned up

下列哪个修饰符可以使在一个类中定义的成员变量只能被同一包中的类访问

A．private

B．无修饰符

C．public

D．protected