EX 1: Fill in the blanks with suitable prepositions.( in, on, of, to, at, about…..)

1. My mother takes care…of...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.

EX 2: Give the correct form of verbs.( chia động từ)

1. The dentist (fill)…………………the cavity in my tooth yesterday.

2. What’s the matter, Minh? I ( have)…………….a toothache.

3. The students ( not go) …………..to school last week.

4. What ………..you( do)…………last night? I ( do) …………my homework.

5. We should ( brush )……………..our teeth twice a day.