Chinese President visited AIDS patients in Beijing's Ditan Hospital on the World AIDS Day, ________ was on Dec.1,2010, and ______ theme was to give all the AIDS patients medical care.

A．which; whose

B．which; of which

C．when; whose

D．on which, its

《印花税暂行条例》规定的应税凭证是( )。

A．产权转移书据

B．权利许可证照

C．资金账簿

D．无息贷款合同

E．经济合同