-- _____is that used for?---_____ the floor.
On the wall hung a picture,__________ colour is blue.
He lived in London for 3 months, during ______ time he learned some English.
__________ has already been pointed out, grammar is not a set of dead rules.
I bought an ancient Chinese vase, _______ was very reasonable.
Dorothy was always speaking highly of her role in the play, ______, of course, made the others unhappy.