31. There is usually a lot of information on these programmes.
33. We should visit and help him with housework. ( should + Vinf )
35. If you don't hurry, we will miss the bus.
-> If you hurry, we won't miss the bus. ( if 1: If + S1 + Vs/es, S2 + will + Vinf )
37. She hasn't gone back to her home village for 2 years.
-> It is + khoảng thời gian + since + S + V2/ed = S + have/has + not + Vpp + for + khoảng thời gian
39. That was the cheapest fridge that my mother could find.