while my mother ________(cook).I am doing my homework.

while my mother ________(cook).I am doing my homework. While my mother_ (cook),I am doing my homework,中间填什么?为什么? While my mother ____(cook), I i was doing my homework while my mother (was cooking)为什么不填co i was doing my homework while my mother was cooking不是一个句子不能有 i am doing my homework,bye英语翻译 I am doing my homework ( r ) now Am i doing my homework at home? one saturday ,i was doing my homework while my mother is_____dinner while i am_____my homework A.making I am doing my homework和i am working on my homework有什么区别? I am doing my homework.对doing my homework.提问是( )you( ).