---- Do you surf the Internet a lot？
---- Well, , I’m too busy with work to surf the Net.
A. all right
B. I have no idea
C. at last
D. to tell you the truth
网友回答
A. all right
B. I have no idea
C. at last
(答案→)D. to tell you the truth
解析：考查交际用语。A. 好的 B.我不知道 C.终于 D. 说实话。句意：你上网很多吗？——嗯，说实话。我工作上网太忙了。结合语境可知选D。