句型转换。

1. The shirt cost me only 50 yuan.(就画线部分提问)

   ______ ______ ______the shirt cost you?

2. Mr Zhang became an English teacher three yearsago. (改为同义旬)

    Mr Zhang ______ ______ an English teacher______three years.

3. Li Ming did his homework at school yesterday.(改为否定句)

    Li Ming ______ his  homework  atschool yesterday.

4. My brother is the tallest boy in his class. (改为同义句)

    My brother is______than ______student in his class.

5.We can't live if there is no water.(改为同义句)

    We can't live ______.

一般来说，Cache的功能 (69) 。某32位计算机的Cache容量为16KB，Cache块的大小为16 B，若主存与Cache的地址映射采用直接映射方式，则主存地址为 1234E8F8(十六进制)的单元装入的Cache地址为 (70) 。

69（）

A．全部由软件实现

B．全部由硬件实现

C．由硬件和软件相结合实现

D．有的计算机由硬件实现，有的计算机由软件实现