写出下列单词的比较级。long → longer
1. short → _______________
2. heavy → _______________
3. thin → _______________
4. strong → _______________
5. small → _______________
6. big → _______________
7. old → _______________
试题答案
1. shorter 2. heavier 3. thinner 4. stronger 5. smaller 6. bigger 7. older