问题 填空题 写出下列单词的过去式。1. eat ______________4. give ______________7. teach ______________2. buy ______________5. fall ______________8. is ______________3. bring ______________6. make ______________9. know ______________ 答案 1. ate 2. bought 3. brought 4. gave 5. fell 6. made 7. taught 8. was 9. knew