I.

1. kind

2. healthy

3. important

4. worried

5. nervous

6. painful

7. serious

8. scared

II.

1. Minh went to the dentist yesterday because he had a bad toothache.

2. The dentist looked at his teeth and told him not to worry.

3. The dentist filled cavity in his tooth last week.

4. Most the children feel scared when they come to see the dentist.

III.

1. c

-> I was absent from class yesterday because I was sick

2. e

-> Minh is going to see the dentist because he has a tootache.

3. f

-> She has healthy teeth because she brushes her teeth after every meals.

4. b

-> Children have toothache because they often eat a lot of candies.

5. a

-> He was happy because his decaying tooth stopped hurting.

6. d

-> We jog every morning because it's good for our health.

I.  Fill in the suitable word:

1 kind

2 healthy

3 important

4 scared

5 worried

6 painful

7 serious

8 nervous

II.. Arrange the sentences:

1. dentist / had/ Minh / a / went / yesterday / because / toothache / to / the / bad / he.

=>Minh went to the dentist yesterday because he had a toothache.

2. at / his / looked / told / the / him / worry / to / not / teeth / and / dentist.

=> The dentist told him not to worry and looked at his teeth

3. filled / cavity / in / dentist / week / his / a / tooth / last / the

=>The dentist filled in his tooth last activity last week

4. they / scared / children / come / the / see / feel / when / to / most / dentist.

The children feel scared when they see most dentist come to

IV.Match the half-sentence with A and B. Using "because":

1- C

2-E

3-F

4-B

5-A

6-D