形容词专项练习题1. 用所给词的适当形式填空 1. My sister is two years _ (old) than I. 2. The short one is _ expensive of the five. 3. The boy is not so _ (interesting) as his brother. 4. Dick sings _(well). She sings _(well) than John, but Mary sings _(well) in her class. 5. She will be much _(happy) in her new house. 6. The Nile is a _ river. It is _ than any other river in the world. (long) 7. Who is _