31. to buy
32. writing
33. were doing
34. is reading 

35. Mr.Puncher doesn't let his children go out in the evening.
36. Tom saw Mr.John left the house very early this morning.
37. I suggest meeting to discuss the price.
38. He denied stealing the money on the table.

31.To buy

32.write

33.were doing

34. is reading

35.Mr.Puncher doesn't let his children go out in the evening.( 35.Mr.Puncher không cho các con đi chơi vào buổi tối.)

36 . Tom saw Mr.John left the house very early this morning.(36. Tom đã thấy Mr.John ra khỏi nhà từ rất sớm sáng nay.)
37 . I suggest meeting to discuss the price.(37. Tôi đề nghị gặp mặt để thảo luận về giá cả. )
38 . He denied stealing the money on the table.(38 Anh ta phủ nhận việc lấy trộm tiền trên bàn.)