I. Give the correct form of  TO BE : is / am / are ( Chia dạng đúng cua động từ  to be )

1. I ( be  ) ……………a doctor.

2. They  ( be  ) ………………tall .

3. He  ( be  ) ………………old.

4. My friend and I ( be  ) ……………….good friends.

5. …………..( be  ) this your house  ? – Yes, It  ( be  ) ………………

6. The children  ( be  ) ……………….lovely.

7. Phong  and Nam  ( be ) ………….ten years old.

8. How many books  ( be  ) ………..there ? There ( be  ) …………one.

9. There ( be  ) ………………twenty students in my class.

10. There ( be  ) ……………some milk in the kitchen.

11. Her lips ( be  ) ……………thin.

12. My sister ( be  ) …………….very nice.

13. What ( be  ) …………those? – They (  not be ) ………. shoes.

14. Nam ( not be  ) ……………..a hard- working student. He ( be ) …………late.

15. It ( not be ) ………….often hot in the winter .       

Viết cách đọc các phần bằng nhau của đơn vị: $\frac{1}{2}; \frac{1}{3}; \frac{1}{4}; \frac{1}{5}$