I.
1. If you don't save money, you won't able to buy the house
2. If I met her, I would give her your letter.
3. If they were faster, they would win the match
4. If she was stronger, she could take some exercise.
5. If he speaks more clearly, people will understand him.
II.
1. Nga said (that) Mr and Mrs Pike had just read these newspapers.
2. She said (that) she often listened to music at night.
3. Lan's mother said (that) her daughter usually brushed her teeth before meals.
4. They said (that) they had to do the assignment then.
~Good luck~