—Dad, can I surf the Internet?
—Again? I wish that you going on line 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
网友回答
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：可联系答.案.网客服索取。