问题补充：
— Dad,can I surf the Internet?
—Again?I wish that you going online your health.
A. know;will do harm to
B. knew;are doing harm to
C. know;have done harm to
D. knew;were doing harm to
答案：
A. know;will do harm to
(答案→)B. knew;are doing harm to
C. know;have done harm to
D. knew;were doing harm to
解析：本题中wish后的宾语从句通常用虚拟语气，表示与事实相反或不太可能实现的愿望。
