work for 和work on的 区别 附加一道题 注重过程 求解Dr wang has been working __the experiment for the whole evening,and he is still continuing ___the experiment after a 20-minute break.A.with, to prepare for B.for ,preparing C .on, preparing D .with,preparing for解释
问题描述：
work for 和work on的 区别 附加一道题 注重过程 求解
Dr wang has been working __the experiment for the whole evening,and he is still continuing ___the experiment after a 20-minute break.
A.with, to prepare for B.for ,preparing C .on, preparing D .with,preparing for
解释
答