题目

--- You know Mary has broken up with her best friend, Jane.    --- No wonder that Mary ________ yesterday.                         A. pulled her leg                           B. gave her the cold shoulder    C. was a wet blanket                      D. had green fingers 答案：B把铁片与下列物质接触不反应的是（　　）A．O2B．CuSO4C．H2SO4D．Al2（SO4）3