建设工程的监理模式中，宜委托一家监理单位进行监理的是( )模式条件下的监理模式。

A．平行承发包

B．设计总分包

C．施工总分包

D．项目总承包

E．项目总承包管理

89. His term papers mainly _____ the history of social developments in Song dynasty.

A．does with

B．treats

C．deals with

D．Deals