问题 填空题 按要求写单词。1. walk (过去式) ____________ 3. went (原形) ____________ 5. ate (原形) ____________ 7. happen (过去式) ____________2. worked (原形) ____________ 4. laugh (过去式) ____________6. is (过去式) ____________ 8. see (过去式) ____________ 答案 1. walked 2. work 3. go 4. laughed 5. eat 6. was 7. happened 8. saw
