--Excuse me which is the way to the post office?--Sorry I don’t know .You can ask the pol

问题补充：

--Excuse me,which is the way to the post office?

--Sorry, I don’t know .You can ask the policeman over there.

--

A. How lucky! B. It’s a pity. C. Thank you all the same.

答案：

解析：在英文中，对于别人想帮助你，但由于不知道未能提供帮助，我们应该仍然表示感谢，故本题选C。