The river has become much ______ than before because of the waste water.A. dirty B. dirtier C. Dirtiest
—_____ kind girl Nancy is! —Yes, she is always ready to help others.
Can you imagine what life will be like in ______ time?
—I can’t stop smoking, doctor. — For your health, I’m afraid you ______.
—Look at the noisy kids!—Haven’t you heard the saying “When the cat is away, the mice ______?”
—Who broke the window? — ______. A strong wind broke it last night.