*Bạn tham khảo nhé!!!!
Exercise 1:
1: goes
2: go
3: didn't use to
4: going
5: be
6: studying
7: play
8: play
Exercise 2:
1: My mother used to live in small village when she was a girl
2: There did not use to be many vehicles on the roads before
3: We went to school by bike 2 years ago
4: There are more traffic accidents now