They found the remains of buildings     under the sand，together with a lot of treasures．

A．being buried

B．buried

C．to be buried

D．burying

供货方应在接到采购方对产品提出异议的书面通知后( )天内负责处理，否则即视为默认采购方提出的异议和处理通知。

A．3

B．5

C．10

D．15