We can have ___ blue sky if we create ___ less polluted world.
- Have you _______ some new ideas?- Yeah. I'll tell you later.
Let's learn to use the problem we are facing now _______ a stepping-stone to future success.
- Every time the exam is over, I will_______ the results.- Take it easy ! Grades are not our whole life.
Ten years ago the population of our village was_______ that of theirs.
Little joy can equal_______ of a surprising ending when you read stories.