Complete the sentences about the picture in exercise 3. Use There's a, There isn't a, There are some or There aren't any.
1. There's a computer on the teacher's desk.
2. There are some dictionaries.
3. There's a book on Emily's desk.
4. There isn't a notice board next to the window.
5. There aren't any posters.
6. There aren't any pens on Jack's desk.