II- Em hãy điền giới từ thích hợp vào chỗ trống trong các câu sau:
1. My mother takes care ....................the family.
2. I smiled ..................... the child and said “ Hello”
3. She always worried .................. her children.
4. Milk is good .................. your health.
5. Most children are scared .................. seeing the dentist.
6. The dentist looked ..................... my teeth.