9. "Don't start any fires in the forest I look after," the ranger said.

→ The ranger said

10. My sister enjoys collecting colorful shells at the seaside.

→ My sister is keen

11. This cave is more difficult to reach than that one.

→ That cave

12. Although he knows it's bad for him, he eats a lot of candy.

→ Despite

13. "We should get enough 7-9 hours of sleep a night" the doctor said

→ The doctor suggested

14. Eating too much fat is bad for your health.

→ It is

15. People think detox diets are healthy. However, they are harmful.

→ Though

16. Health experts advise against eating too much salt every day.

→ Health experts suggest

`9.` The ranger said not to start any fires in the forest he looked after.

`-` S + said + not to + V

`=>` Người kiểm lâm nói không được đốt lửa trong khu rừng mà ông ấy trông coi.

`10.` My sister is keen on collecting colorful shells at the seaside.

`-` To be keen on + V-ing

`=>` Chị gái tôi thích sưu tầm vỏ sò đầy màu sắc ở bờ biển.

`11.` That cave is easier to reach than this one.

`-` S + be + easier to + V + than + N

`=>` Cái hang đó dễ tiếp cận hơn cái này.

`12.` Despite knowing it's bad for him, he eats a lot of candy.

`-` Despite + V-ing/N, S + V

`=>` Mặc dù biết nó có hại cho mình, anh ấy vẫn ăn rất nhiều kẹo.

`13.` The doctor suggested getting enough 7-9 hours of sleep a night.

`-` Suggest + V-ing

`=>` Bác sĩ đề nghị nên ngủ đủ 7-9 tiếng mỗi đêm.

`14.` It is bad for your health to eat too much fat.

`-` It is + adj + for sb + to V

`=>` Ăn quá nhiều chất béo có hại cho sức khỏe của bạn.

`15.` Though people think detox diets are healthy, they are harmful.

`-` Though + S + V, S + V

`=>` Mặc dù mọi người nghĩ rằng chế độ ăn thải độc tốt cho sức khỏe, nhưng chúng lại có hại.

`16.` Health experts suggest not eating too much salt every day.

`-` Suggest + not + V-ing

`=>` Các chuyên gia y tế khuyên không nên ăn quá nhiều muối mỗi ngày.