Choose the best answer. 1. It is easy _______ this exercise. A. to do B. doing C. did D. does 2. We can make toys from __________. A. cans B. old newspapers C. representative D. tourist 3. I promise I _________do my homework. A. may B. will C. do D. certainly 4. The vase ______ yesterday is my father favorite one. A. broke B. breaking C. break D. broken