Doing homework ( ) me two hours yesterdayAspent B took C costs D used选一个我想知道为什么?

I'm doing homework是什么意思 I'm doing my homework.对doing my homework提问 I‘m doing my homework 翻译 I'm doing homework.问句是什么 l'm doing my homework问句 是 i do homework 还是 i'm doing homework doing homework, I'm busy doing my homework 对doing my homework 提问 I‘m doing my homework.改一般疑问句 I'm doing my homework.改一般疑问句 I'm doing my homework.(把I 改成he) I m doing my homework.（变问句）? I'm doing my homework.(改为否定句) I’m doing my homework now.对画线部分提问【划得是I’m doing my homework】 i'm doing homework 和 i'm doing my homework 是不是一样的意思,语法上有什么不同吗? i'm doing homework and i'm doing my homework 是一样的吗?两者语法上有区别吗? A:what are your doing ? B:i'm doing my homework .A:what are your doing ?B:i'm doing my homework .why?请问这个why怎么解? I’m doing my homework. (改为一般疑问句) （） () doing () homwork?I’m doing my homework. (改为一般疑问句) （） () doing () homwork?