III. Điền các giới từ thích hợp vào chỗ trống.

1.      My mother takes care…….the family.

2.      She smiled………….the child and said “Hello”.

3.      I’m really worried……………….my brother.

4.      Milk is good………………your health.

5.      Most children are scared……………seeing the dentist.

6.      The dentist looked……………my teeth.

7.      Minh has an appointment…………..10.30 this morning.

8.      Dr Lai filled the cavity………………Minh’s tooth.