. Mathematics ______ the language of science.

. The young ______ the vital forces in our society.

. Every man, woman and child ______ some history, enough at least, to survive in the world.

.  None of them ______ my friends.

. Not only the whole nation, but the whole Europe , indeed the whole human society ______ to alter its attitude to racial problems.

. Getting to other planets or to the moon _____ many problems.

. In that country, the rich ______ richer, the poor, poorer.

. Not one in one hundred children exposed to the disease ______ likely to develop it.

Last summer I took a course on______.

．Paul doesn't have to be made ______ .He always works hard．