4.Are there any boys in the picture?
-Yes, there are.
Are there any trees in the picture?
- Yes, there are.
Are there any cars in the picture?
- No, there aren't.
Is there any dog in the picture?
- Yes, there is.
- Is there any cat in the picture?
- No, there isn't.

5.
1). There is; it is.
2). There are; they are.
3). There are; they are.
4). There is; it is.

6.
1). any bread
2). some eggs
3). some pictures
4). some students.