C. 1. True
2. False
3. False
4. True
1. Some play at home, others play in arcades.
2. Because they can be addictive and tired or dizzy.
3. They should take part in outdoor activities with their friends to develop their social skills.
4. Yes, I do / No, I don't
D. 1. Yes, they do.
2. Last summer, they went to Nha Trang.
3. In the morning, Nam played soccer with his father on the beach.
4. They saw different kinds of fish there.
E. 1. She is going to write a letter to her cousin, Oanh.
2. It’s about 90 miles from Vung Tau to Oanh's village
3. Last summer they stayed with Oanh for a week.
4. Yes, they did.
5. In the afternoon, they went boating and fishing on the lake.