EX 6:   
1. She usually takes a lot of beautiful photos.
2. Some animals do not eat during winter.
3. In the future, people will prefer outdoor activities.
4. Will you still play badminton next year?
5. Yesterday, I did not go to work because I was not very well.
6. Have you lived in Hanoi since 2010?
7. They have collected hundreds of book so far.
8. Have you ever seen a rel lion?
9. I have not my son for a month.
10. My dad enjoys riding his bike to work.
EX 7:
1. I want to eat some food but I have a sore throat.
3. The Japanese eat healthily, so they live for a long time.
4. I feel tired and weak.
5. Go to see the doctor or you can go to bed now and rest.
8. Place a bin here and there, and then people will throw rubbish into them.
9. They've decided to clean the lake up because it is full of rubbish.