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