Измените следующие предложения по образцу.
Образец : This is a postcard---These are postcards.
Those are our friends---That is our friend.
1. This is a newspaper
2. That is my sister
3. Is this your dictionary?
4. That is not his bag
5. Those people are clerks
6. Give me that spoon
7. Are these pencils red?
8. This mistake is very bad
9. Is that a dog or a wolf?
10. These letters are for me
11. Spell this word, please