—My teacher says she’s canceling the class play. I just can’t understand.

— __________. You were looking forward to it.

A．It doesn’t matter.

B．It’s very unwise of her.

C．Don’t worry about it.

D．You must be disappointed.

文件系统中若文件的物理结构采用顺序结构，则文件控制块 FCB 中关于文件的物理位置应包括：______。Ⅰ. 首块地址；Ⅱ. 文件长度；Ⅲ. 索引表地址。

A．只有Ⅰ

B．Ⅰ和Ⅱ

C．Ⅰ和Ⅲ

D．Ⅱ和Ⅲ