6. Nam is too young to drive a car. => Nam isn't ......
Nam isn't old enought to drive a car.
7. I will go to China next week, she said that to me.......
She said to me that she would go to China the following week.
8. We mustn't throw away the traditional "ao dai". => The traditional "ao dai" ......
The traditional "ao dai" mustn't be thrown away.
9. He couldn't come because of his serious illness. => because......
Because he had serious illness, he couldn't come.
10. We can solve the problem. => the problem......
The problem can be solved.
11. Peter doesn't have the key, so he can't get into the house. => If Peter .......
If Peter had the key, he could get into the house.
12. In spite of being tired, John finished his homework. => Although.....
Although John was tired, he finished his homework.