My sister was reading a book while she was listening to the book那是主句,哪是从句?

My sister was（） ill yesterday I was surprised to learn that my sister was drinking there was no questinon that she was my best sister . I was cooking while my sister was sleeping I was busy to ______(babysit)my sister yesterdayWhy? my sister told me who she was waiting The girl sat in the room yesterday was my sister. my sister was born ______the fifth of january,1992 my sister was dancing while i ___ the piano. 'My watch was broken by my sister.这里用'WAS BROKEN'是对的吗? I was trying my best to finish my work when my sister was whtching TV 这句话有语法错误吗? My sister's dream was ____ (be) a dancer when she was a little girl. When I was three years old just before my sister was 求翻译：My sister's hair was no darker than mine when I was her age. My birthday is_____January,1990, and my sister was born on_____(twelve) of March 改为同义句：My mother was ill,so I had to look after my sister. While my brother was playing the guitar ,my sister listened to music.哪里错了 the book,____for my elder sister as a birthday present,was lost on my way home