16.Ba used to spend 2 hours a day to practice speaking English.
It used to. take Ba 2 hours a day practicing speaking English.
17. My sister often runs 3 kilometers in 7 minutes.
It often takes My sister to run 3 kilometers in 7 minutes.
18.I ride my bike to school in 20 minutes every morning.
It takes me 20 minutes to ride my bike to school  every morning.
19.Bac spends1 hour playing badmintonwith his friends every afternoon.
It . takes ba 1 hour to play badmintonwith his friends every afternoon.