=>
2. She is the most kind-hearted girl I have ever met.
-> so sánh nhất the most adj
3. Big Heart organization has encouraged people to protect the environment.
-> thì HTHT (S have/has V3/ed)
4. It is a good idea to eat different kinds of fruit and vegetables every day.
-> it's a good idea to V ~ ý tưởng/ý kiến tốt khi làm gì (should V)
5. My brother doesn't like ice-skating because he thinks it is dangerous.
-> because S V : bởi vì
6. How many eggs do we need to cook an omelette?
-> how many + N số nhiều : bao nhiêu?
7. These clothes are not as expensive as I thought.
-> so sánh bằng not as adj as