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16.Ba used to spend 2 hours a day to practice speaking English.
It used to.........
17. My sister often runs 3 kilometers in 7 minutes.
It often......
18.I ride my bike to school in 20 minutes every morning.
It .......
19.Bac spends1 hour playing badmintonwith his friends every afternoon.
It .........
20. It took mel hours to do my English homework last night.
I.......