My mother is cooking meals _________(当……的时候）Im doing my homework.我用了“until ” 怎么错了?

填介词My mother is good( )cooking My mother is cooking a good meal. my mother is cooking ( )us.填介词 my mother is ( )《interest》 in cooking. My mother is cooking dinner.对cooking dinner进行提问 My mother is cooking.怎样用what对 cooking提问 my mother is cooking dinner 中的cooking dinner提问 My mother is (cooking).《用 what就画线部分提问》 my mother is (cooking)对括号部分提问 用WHAT 就括号部分提问：My mother is (cooking) my mother is （cooking dinner）对括号部分提问 My mother is cooking _in__the__kitchen_.(划线部分提问） My mother is cooking _in__the__kitchen_.(划线部分提问） 完形填空My mother is ( )cooking dinner in kitchen My mother is cooking now.改为否定句 My mother is cooking t___ now.应该填什么My mother is cooking r___ now,不好意思打错了 My mother is cooking the meals 对 cooking the meals提问 my mother still cooking是什么意思