I don′t care how you do the job. I only care _____ it can be done. Just give me a date!

I don′t care how you do the job. I only care _____ it can be done. Just give me a date!
A. where B. what C. why D. when
【答案】D
【解析】
【详解】句意：我不在乎你怎么做这份工作，我只在乎什么时候能做，给我一个日期！本题考查宾语从句的引导词。where哪里；what什么；why什么；when什么时候，据Just give me a date!可知，应该是"什么时候"，用疑问词when，故选D。