桌子上有一本书和两支钢笔；在吉姆的书包里有一些书；我们学校有许多学生；书包里有一些地图吗？在树上...

1 There is a book and two pens on the desk。2 There are some books in Jim's schoolbag。3 There are many students in our school。4Are there any maps in the schoolbag？

这是都是和词组"there be"有关,关键是要掌握就近原则
前几句有人已经回答了我来补充后面的
There are two rulers and an eraser on your desk.There are apples on the tree.There is no student in the library.

There is a book and two pens on the desk. There are some books in Jim's school bag. There are many students in our school. Are there any maps in the school bag? There is no bird in the tree.

There are a book and two pens on the table.
There are some books in Jim's backpack.
There are a lot of students in our school.
Are there any maps in the backpack?
（后面还有）

There is a book and two pens on the desk.There are several books in Jim's bag.There are many students in our school.Are there some maps in th bag?There is no bird in the tree.There are two rulers and