The school rules state that no child _____ out of the school, unless accompanied by an adult.

A．shall allow

B．shall be allowed

C．will allow

D．will be allowed

世界银行和亚洲开发银行把采购方式划分为国际竞争性招标、国内竞争性招标、______等方式。

A．有限国际招标

B．公开招标

C．询价采购

D．直接签订合同

E．单一来源采购