LAST NIGHT WE...AT HOME.A

20. - DE KIEM TRA LOP 10 HE 3 NAM LIEN MAPDE KIEM TRA LAI LOP 10 2007DOC
DE KIEM TRA LOP 10 HE 3 NAM LIEN MAPDE KIEM TRA LAI LOP 10 2007DOC

20. Last night we...at home.

A: are B: will be C: were D: shall be