Question

找出名子的错误，并改正 1.Reading are very important. 2.Either you or she are to go.

3.There are a pen, a knife and several books on the desk.
4.The teacher together with some students are visiting the factory.

Answer 1

1.are---is 动词的ing作主语用单数谓语动词。
2.are--is 就近原则
3.are---is就近原则
4. are---is 就远原则，主语是the teacher。
很高兴为你解答！
老师祝你学习进步！
望采纳，多谢你的问题！^_^

Answer 2

1.Reading【 is 】very important.
2.Either you or she【 is 】to go.
3.There 【is】 a pen, a knife and several books on the desk.
4.The teacher together with some students【 is 】visiting the factory.