( )when did she wait on the freezing cold morning.(要原因) / Un

( )when did she wait on the freezing cold morning.(要原因) / Until For When
My father often writes me ( ) my study.
in connetion in connection with connect on connection to
They regarded her ( ) their big sister.
for as to at

until
My father often writes me ( in connection with ) my study.
They regarded her ( as ) their big sister.
until直到 直到她等到寒冷的早晨的时候