Substances will expand or contract ______ heated or cooled, but this is not the case with water.
.—Have your working conditions improved?—No, _____ than before, I’m afraid.
These natural parks are very important for preserving many animals, which would _______ run the risk of becoming extinct.
People are always on the go , so they spend their weekend on housework .
On the third floor there are two rooms, _____ is used as a meeting-room.
—Are you satisfied with her work, sir? —Not at all. It couldn’t be any _______.