II/ Thêm am not, aren’t, isn’t vào những câu sau:
1. This _________ my pen.
2. Those _________ clocks.
3. They _________ windows.
4. It _________ a pencil.
5. My father _________ a doctor. He is a teacher.
6. This ruler _________ long. It is short.
7. Those schools _________ big. They are small.
8. I _________ a nurse.
9. You _________ engineers.
10. Ba and Bao _________ here.
1.isn't
2. Aren't
3. Aren't
4. Isn't
5. Isn't
6. Isn't
7. Aren't
8. Am not
9. Aren't
10. Aren't
1.Isn't
2.Aren't
3.Aren't
4.Isn't
5.Isn't
6.Isn't
7. Aren't
8. Am not
9. Aren't
10. Aren't