Cathy is taking notes of the grammatical rules in class at Sunshine School,where she_______English for a year.

A．studies

B．studied

C．is studying

D．has been studying

“太多的货币追求太少的商品”，从而导致一般物价水平上涨，这种情形属于（）通货膨胀。

A．需求拉上型

B．成本推进型

C．结构型

D．隐蔽型