—Have you finished your composition already, Jack?  

—Yes, I _____ it within half an hour.  [ ]

A. have finished

B. finish

C. finished  

D. had finished

房地产开发企业将待售开发产品转作经营性资产，先以经营性租赁方式租出或以融资租赁方式租出以后再出售的，租赁期间取得的价款按分期付款销售资产方式确认收入实现。( )