--Do you often read English magazines? 

-- No, because I find the words _____the magazines too hard ____ me to understand.

A．in, for

B．on, for

C．in, of

D．on, of

下列（）不属于信息接收者反馈的重要形式。

A.信息接收者的答复

B.绩效评估

C.信息接收者的行动

D.信息发出者提问