Помогите. Очень прошу. Поставьте последующие предложения в отрицательную и вопросительную форму:

1. This cup is yellow.
a) This cup isnt yellow.
b) Is this cup yellow?
2. That pencil is red.
a) That pencil isnt red.
b) Is that pencil red?
3. She is opening the exercise-book.
a) She isnt opening the exercise-book.
b) Is she openinig the exercise-book?
4. This is a nice city.
5. This is a long text.
a) This isnt a long text.
b) Is this a long text?
6. Those men are doctors.
a) Those men arent doctors.
b) Are those men doctors?
7. The spoons are on the table.
a) The spoons arent on the table.
b) Are the spoons on the table?