--- You’re quite free now, I think.
--- . I have tons of things to do!
A. By accident
B. On the contrary
C. That’s right
D. I can’t agree more
网友回答
A. By accident
(答案→)B. On the contrary
C. That’s right
D. I can’t agree more
解析：句意：--我认为你现在一点都不忙。--相反，我有许多事情要做。By accident偶然，意外地；On the contrary相反；That’s right对的；I can’t agree more我非常同意。根据句意故选B。