7. Who between the two workers is the (good).......................?
8. This old machine is (powerful)................than we thought.
9. The farmers have never had a (rich)............ harvest than that.
10. Which is (difficult)........................, English or Math?
11. It is the (expensive).....................of the two cars.
12. Which is the (expensive).....................of these two coats?
13. What is the (long)...................river in Vietnam.