— Have you finished the work?

— Not yet, but no matter how hard it is, we'll keep             until we make it. [ ]

A. failed

B. trying

C. tried

D. falling

一套建筑面积100m²、单价3000元/m²、总价30万元的住房，从成交日期时起分期付清，分三期支付。第一期于成交日期支付10万元，第二期于半年内支付10万元，第三期于一年内支付10万元，则该房的实际总价为( )万元。

A．27

B．28.5

C．29.28

D．30