The woman does some cleaning every day, because she wants to keep the house_____________.

I phoned you at about three this afternoon, but no one answered.— Oh, that was probably _______ I was doing exercise outdoors

You needn’t take a taxi to go to the station, because it is____walking distance here

I don’t think it is good for animals to stay at zoos, ___________? —- I agree with you.

On the top of the books ________the stamp album my uncle gave me as a birthday present.