.— When did they come back last night?— It was midnight ____ all of us were sleeping.
Schools in the south tend to be better equipped,_______those in the north are relatively poor.
Many large cities,such as Liverpool and New York,have had experiments of this kind,_______old factories turned into successful art centers.
_You should think _______yourself instead of just obeying others.
_This year the white ducks are no longer lovely in locals’ eyes, ______ their fear of bird flu.
_I like to have my photos taken_______there are mountains and rivers.