The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.

A．mainly

B．punctually

C．approximately

D．precisely

公私合作提供初始投资量较大的基础设施项目，一般采取（）形式。

A.授权经营

B.政府垄断

C.政府补助

D.政府参股