­—You look so young．Haven’t you graduated from your university?

—Yes, I         in the English Department of Shandong University for four years．

A．studied

B．study

C．had studied

D．was studying

H股上市的有关文本包括( )。

A．招股书

B．认购申请书

C．董事及监事声明

D．承销协议