—Why don't we just leave it until tomorrow?— I'm dead tired today.A. Forget it.B. I could

问题补充：

．—Why don we just leave it until tomorrow?

— Im dead tired today.

A. Forget it.

B. I couldn agree more.

C. It all depends.

D. Don mention it.

答案：

A. Forget it.

(答案→)B. I couldn agree more.

C. It all depends.

D. Don mention it.

解析：B 考察交际英语。前者提出把事情推迟到明天，后者表示同意，因为他今天太累了。B我非常同意；A算了吧！C看情况；D不客气。故B正确。