XII :

3. How high is that buiding?

4. How many apples do you like to eat?

5. Why don't we play soccer this afternoon?

6. How much do these shoes cost?

7. There are twelve packets of tea in the box.

8. Lake Baikal is the deepest lake in the world.

9. You must arrive on time.

10. You should not eat lots of sweets.

XIII :

1. I often go swimming with some friends when it is hot. (câu cho trước hình như bị sai)

2. His sister has small white teeth and thin lips.

3. He is a lifter so he is very strong and heavy.

4. He doesn't like fish because it isn't his favourite food.

5. We should not burn and cut down trees forests.