The best way to explore _______ countryside is on _______foot.
There is hardly an environment on earth _____ some species of animals or other have not adapted successfully.
I like this jacket better than that one, but it costs almost three times______.
It was hard for him to learn English in a family, in which _____ of the parents spoke the language.
—He doesn’t have_____furniture in his room.—Just an old desk.
Our nerghbors gave _____ a baby bird yesterday that hurt ______ when it fell from its nest.