=>
VI/
31. Tet is so important a celebration that family members living apart try to come back home.
32. If you decide to take the trip, you will have to get ready a few months before the flight.
VII/
33. Peter suggested cloth bags should be used instead of plastic bags.
34. In spite of feeling tired, everyone didn't sit down to have a rest.
35. The professor to whom he is talking is excellent
36. If we had time, it would be possible to do this. / If we had time, we would be able to do this.
