—The doctor told me _______ too much but I find it difficult.

—The doctor is right. The less you drink, _______ you will be. [ ]

A. don't drink; the healthier

B. not to drink; the healthier

C. not to drink; the more healthier

D. don't drink; healthier

WindowsXP属于一种（）操作系统。

A.单用户单任务

B.单用户多任务

C.多用户单任务

D.多用户多任务