1. don't --> didn't

2. are --> were

3. need --> need to

4. after --> in

5. stay --> to stay

6. the --> in the

7. wait --> to wait

8. at --> with

1. Why don't you come to school yesterday, Hoa? ----> didn't

2. Where are you yesterday, Nam?-----> were

3. I need take your temperature.----> need to take

4. The doctor will see you after a few minutes-----> bỏ a

5. The doctor told me stay in bed.-----> me to stay

6. I am having headache. -----> a headache

 7. The doctor told me wait for him in the waiting room.-----> to wait

8. What's the matter at you? ----> How is