I have never traveled on a plane(改为一般疑问句) _Have__ you _traveled_____ teaveled on a plane? __Has____he have berakfast yet? No,he _hasn't_____ To learn English well isn't important ,I think(连成一句) I don't___ __think____it's ___inportant___ to_____learn English children have a __balanceable(平衡的,不知道你们学的是哪一个单词,一般这个常用)_____(balance) diet