As a manager, I know my emotions will affect people around me, so I’m going to make a _______ effort to be more cheerful.

A．precious

B．curious

C．mysterious

D．conscious

建设单位应在验收后（）天内将施工、设计、监理、建设方分别签字的质量验收证明报监督机构备案。

A.3

B.5

C.15

D.30