14．Mum, you really need to have a. rest! You_________in the kitchen ever since you came back home three hours ago.

A．had worked

B．were working

C．have been working

D．Worked

某投资项目建设期为3年，在建设期第一年贷款100万元，第二年贷款300万元，第三年贷款100万元，贷款年利串为6%。用复利法计算，该项目的建设期贷款利息应为( )万元。

A．62.18

B．46.27

C．30.00

D．15.00