1 They used to swim in the river
2 My brother played soccer last Sunday
3 We have lived here for 10 years
II
1The teacher asked Nam to open the door.
2. Mai told to help her with her pronunciation
3. Mrs. Lan asked Ba not to talk during the test
III
1 interesting
2. I'd like to visit Australia because people are very friendly
VI
1 Their mother told them not to make so much noise
2 . My sister is old enough to go to school.