My sister is good__singing songs中间填什么介词?

The girl ------white is my little sister .横线上填什么介词 She is a friend ( )my sister's.填介词 my sister always takes the train ______home填什么介词 this is my new watch.it was a present___my wife.中间填空填介词什么? She is a sister of my ____ (sister) 填什么 Betty is in Beijing (填什么介词) her sister mary is a teacher, what-----her sister? 填什么介词 ＿my sister's（填介词 ） My parents' d_____ is my sister填什么 she is friendly （）classmates.中间应该填什么介词 填介词或副词.1.The girl( )a white skirt is my sister.2.Class is ( 填介词,-What ___ this ring?Is it yours,too?-No,it is my sister'