3. Keep our environment clean and we will enjoy a healthy life.
-> If …………………………………………………………………………………
4. The last time I saw John was when he was leaving for Edinburgh.
-> John has ………………………………………………………………
5. Duong is a stronger swimmer than his friends.
-> Duong swims ………………………………………………………
6. Despite not being rich, people in the countryside often have a peaceful and happy life.
-> Although …………………………………………………………………
3 If we keep our environment clean, we will enjoy a healthy life.
4 John hasn't been seen by me since he was...
5. Duong is a stronger swimmer than his friends.
-> Duong swims more strongly than his friends
6. Despite not being rich, people in the countryside often have a peaceful and happy life.
-> Although people in the countryside are not rich, they often have a peaceful and happy life
