21, …they spent their holidays on a farm every year.

22, … they had gone for a picnic.

23, … his mother had come home late.

24, …he was looking for his key.

25, …they had bought a farmhouse in the country.

26, …he had been to the top of the Empire State Building.

27, …she had forgot to give him her address.

28, … he liked science fiction books.

29, …to come in

30, … to sit down.

31, …to call a doctor.

32, … to eat the pizza.

33, …to tell everything.

34, …he had visited that museum the previous week.

35, …she was the best for that job.

36, … the crisis would be overcome the following year.

37, … nobody had ever fallen off a horse there.

38, …none of his workers had to work overtime then.

39, … to stop the car.

40, …not to be so loud.

41, … to keep moving.