=>
I/
1. am
2. Is
3. is
4. are
5. is
6. are
7. is
8. are
9. Are
10. Are
11. Are
12. are
13. are
14. are
II/
1. (-) Her name isn't Linh.
(?) Is her name Linh?
2. (-) They aren't nurses.
(?) Are they nurses?
3. (-) I am not a doctor.
(?) Are you a doctor?
4. (-) Those aren't his pens.
(?) Are those his pens?
5. (-) My father isn't an engineer.
(?) Is your father an engineer?
6. (-) Her brother isn't a good student.
(?) Is her brother a good student?
7. (-) They aren't in the class.
(?) Are they in the class?
8. (-) Phong's school isn't in the country.
(?) Is Phong's school in the country?
9. (-) I am not in class 6A.
(?) Are you in class 6A?
10. (-) The books aren't in Minh's desk.
(?) Are the books in Minh's desk?
III/
1. they are
2. that isn't
3. I am
4. they aren't
5. he is

6. he isn't
7. she is
8. they aren't
9. they are
10. I am not
IV/
1. Are they/are
2. Where is Lan?/ Is she 
isn't/is