$a+b$ bằng?

2. Mr Hien isn’t live in a house in the country.

3. The Browns are traveling to Ho Chi Minh City in train.

4. There aren’t a trees to the left of Lan’s house.

5. That’s my sister over there .She stands near the window

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6. Do you know how many teachers does our school have?

7. She cooks in the kitchen at the moment.

8. Are you travel to school by bus everyday?

9. Does she listen to music now?

10. He watching TV in the living room now.

11. Where is Lan?

12. She does English exercises in her room.

13. What does your sister do when it hot?

14. Nga likes the fall because she likes the weather cool.

15. His brother often playing volleyball in the summer

16. It is very cold in the summer in our country