The visitors said that they had never dreamed ______ such a beautiful scenery.

A．there to be

B．of there to be

C．of there being

D．of being

适用于没有施工图，工程量不明，却急需开工的紧迫工程的计价合同是( )。

A．估算工程量单价合同
B．纯单价合同
C．可调单价合同
D．成本加酬金合同