— Where have you been recently?

— I ________ in Beijing on business for a week last month. [ ]

A. have worked  

B. was working

C. have been working  

D. worked

企业在对固定资产进行维修时，应将发生的费用通过预提或待摊的方式进行核算，不能一次性计入当期费用。（）