问题 填空题 按要求写单词。1. son (同音词) ___________ 4. animal (复数) ___________2. this (对应词) ___________5. clean (过去式) ___________ 3. story (复数) ___________6. buy (过去式) ___________ 答案 1. sun 2. that 3. stories 4. animals 5. cleaned 6. bought