1. I enjoy playing sports because it is good for my health (enjoy doing s.th: thích làm gì; Because + Clause, Clause; tobe good for s.th: tốt cho cái gì)

2. Do your children go camping every summer holiday? (every summer holiday: HTĐ (?): Do/Does + S + V(inf) + ...?)

3. I think photography can be an expensive hobby (think doing s.th/s.th + tobe + adj: nghĩ làm gì/cái gì như thế nào; can + V(inf): có thể)

4. My cousin will give me a book as a gift for my next birthday (next birthday: TLĐ)

5. He finds mountain climbing dangerous, so he doesn't take it (find doing s.th/s.th + adj: nghĩ làm gì/cái gì như thế nào)

6. I hope in the future, he will teach me how to do eggshell carving (in the future: TLĐ; how to do s.th: cách để làm gì)