(be) your sister Lucy?这道题用哪个be动词啊,为什么

what ____(be) your sister doing (be) your sister Lucy?这道题用哪个be动词啊,为什么 Your sister your sister ____（be) your sister a member of the reading club I don`t want to be your sister I want to be your baby...什么意思? I want to be your sister for I only want to be your friend 英语 英语 (22 22:50:2)1.I want to be an artist in the future.(改成同义句)My _____  _____  is to be an artist.2.Lncy isn't as outgoing as her twin sister,Lily. (改成同义句)Lily is _____  ____  than her sister,Luc Have your sister or Has your sister? luc 是什么意思 她是谁?：If your uncle’s sister’s daughter is not your cousin,she must be your _______. She is your sister down your sister's I'm your sister your sister是什么意思 fucking your sister Is that ( ) your sister your sister 神马意思,