In his speech the headmaster __________ to the great help the school received from the district government.

A．expressed

B．pointed

C．explained

D．referred

空白重要凭证对外出售时应在（）上详细载明凭证名称、数量、起讫号码等内容，由客户签收后将凭证交付

A、《空白重要凭证保管登记簿》

B、《空白重要凭证使用登记簿》

C、《空白重要凭证查库登记簿》

D、《空白重要凭证出售登记簿》