1.listen ,who is playing the violin?it （may be ）Lily she lov

1.listen ,who is playing the violin?it （may be ）Lily she loves music.请问括号内的能换成can be
说说may be ,can be,must be,的用法和区别
2.the little cat is very weak and it can't stand up.请问 up能去掉吗?stand up和stand有什么区别吗
3.what surprised us was that the "famers'"were not really farmers.they were students from a small elementary,请问what surprised us was surprised此处是动词吧,怎么和was 在一块了
4.now everything on the farm goes well.译这个句子
5.they want the students to be close to the land and learn to help each other outside the classroom..译这个句子
6.by seelling the rice and giving farming classes to the community...译这个句子