.

—Was _________________ problem solved?

—We were trying to think of _________________ way out, but it was difficult to find one.

A．a; a

B．a; the

C．the; a

D．the; the

( )是反映项目实际造价的技术经济文件，是开发商进行经济核算的重要依据。

A．投资估算

B．竣工结算

C．成本结算

D．技术报告