11. Dentist/ had/Minh/a/went/yesterday/ because/ toothache/ to/ the/ bad/ he.
⇒ Minh went to the dentist because he had a bad toothchache yesterday.
12. Appointment/ had/ an/ he/ 10:30/ at.
⇒ He had an appointment at 10 : 30.
13. By/ to/ travelled/ the USA/ plane/ last/ they/ month.
⇒ They travelled to the USA by plane last month.
14. English/ they/ at/ practicing/ the moment/ are.
⇒ They are practicing English at the moment.
15. Filled/ cavity/ in/ dentist/ week/ his/ a/ tooth/ last/ the.
⇒ The dentist filled the cavity in his tooth last week.
16. They/ scared/ children/ come/ the/ see/ feel/ when/ to/ most/ dentist.
⇒ The childen feel most scared when they come to see dentist.
17. at/ his/ looked/ told/ the/ him/ to/ worry/ not/ teeth/ and/ dentist.
⇒ The dentist looked at his teeth and told him not to worry.
18. brushes/ three/ her/ times/ Nga/ a/ teeth/ day.
⇒ Nga brushes her teeth three times a day.
19. had/ went/ she/ because/ to/ the/ a/ doctor/ backache/ she.  
⇒ She went to the doctor because she had a backache.
20. at/ met/ last/ the City’s Theater/ we/ night.
⇒ We met at the City's Theater last night.

11. Minh went to the dentist because he had a bad toothchase yesterday.

12. He had an appointment at 10 : 30.

13. They travelled to the USA by plane last month.

14. Thay are practicing English at the moment.

15. The dentist cavity his a tooth last the filled.

16. The childen feel most scared when they come to see dentist.

17. The dentst told to him not worry and his teeth at looked.

18. Nga brushes her teeth three times a day.

19. She went to the doctor because she had a backache.

20. We met at the City 's Theater last night.