REWRITE 
1. I realized how much i loved my country only after i had left it .
Ony.................
2.The water is so dirty that we can't use it .
The water is ...................
3.He not only spent all his money , he even borrowed some from me .
Not only........................................
4. I coudn't have solved the problem if my father hadn't helped me 
If it .......................................
5. It's worthless paiting the room . 
There is .................................................
6. Keeping calm is the secret of passing your final test .
As long ..........................................
7. She left for Ha Noi Capital , but right after that it began to rain .
Hardly ...............................................
8. I wish i had visited the city .
It is a ..........................
9. How long haven't you heard from her?
When .........................................
10. He was punished because of his bad behavior.
Had he.......................