Expo 2010 Shanghai China will offer ____ wonderful opportunity for ____ cross - culture dialogues．

A．a;不填

B．a; the

C．不填;the

D．the;不填

采用证券给付结算方式行权且权证在行权期满时为价内权证的，代为办理权证行权的证券经纪商应在权证期满前的5个交易日提醒未行权的权证持有 * * 证即将期满，或按事先约定代为行权。( )