is Alice my friend.(改为一般疑问句) that is your mother?(做肯定回答) Is That his sister.(改为一般疑问句)
This is an appIe.(改为单数句子)
Bob is not your brother?(作否定回答)不客气哈^O^哈哈好好学习，天天向上嗯﹏加油你英语挺好的我英语最烂了哦，我喜欢物理，从初中到大学一直都学物理，哈哈呵？？(^V^)`哦？？你之前发的笑脸，刚看见，回复一下，以为你有什么事呢没事