LAST NIGHT, I WAS WATCHING T.V _________ MY MOTHER WAS COOKING IN...

26. - TRAC NGHIEM TIENG ANH 9 MOI 26. - TRAC NGHIEM TIENG ANH 9 MOI
TRAC NGHIEM TIENG ANH 9 MOI

26. Last night, I was watching T.V _________ my mother was cooking in the kitchen.

A. then B. and C. when D. while