—You learned to drive a car quite young, didn’t you?

—Yes, my father _______ me when I was thirteen.

A．taught

B．had taught

C．would taught

D．was teaching

在Cache实现的两种写策略中，（）的速度快，“写”操作能以Cache存储器速度进行，访存次数少；采用（）总能保持Cache和主存内容的一致。