若采用住房抵押方式申请留学保证金贷款， 则放款前提条件为（）

A、凭抵押登记证明放款

B、凭抵押回执放款

C、凭正式评估报告放款

D、凭抵押合同放款

Passage Two

What is considered to be the operating standard for global communication

A．The Internet.

B．The English language.

C．The networked computer.

D．The electronic media.