busy____ my homework 横线上填什么介词

busy____ my homework 横线上填什么介词 My mum is busy____(shop)all the time. 初一上英语练习册上的题Lucy is busy doing her homework .(改为同义句）Lucy is busy____ ____.横线上应填什么? I have my homework do my homework是什么意思 I did my homework I did my homework yesterday 划线did my homework I'm doing my homework.对doing my homework提问 doing my homework 是否可以换成on my homework my,do,too,i,homework(.,) l do my homework,too. finish my homework怎么造句? I（ ）[do]my homework My homework ___(do) already when I finish () my homework She is busy____(work)these days. Her mother is busy____(do)the housework. I did my homework yesterday对did my homeworI did my homework yesterday对did my homework进行提问)