b,c срочна пожалуйста помогите

3/ What is this? It is a DVD
4. What are these? They are keys
5. what is what? it is a hotel
6. What is that? It is a dairy
7. What is this? It is a mobile phone
8. What are those ? They are dictionaries
9. what is that? it is a printer
10. what are these? they are glasses
11. what is that? it is tv
12. what are these? they are tickets