—Do John and Betty have a child？

—Yes. They _______ for twenty years.

A．married

B．have married

C．have got married

D．have been married

标底价格的编制依据有( )。

A．招标文件确定的计价依据和计价方法

B．经验数据资料

C．工程量清单

D．施工组织设计和施工方案等

E．工程设计文件