Question 33. Nam's still studying English. He started studying it two years ago. (for)
→Nam has studied English for two years
Question 34. The most excellent students who were rewarded the scholarship would have a two-week holiday in Vung Tau. (replacing the relative clauses with participle clauses)
→ The most excellent students rewarded the scholarship would have a two-week holiday in vung tau.
Question 35. After the students had learnt about the benefits of recycling and reusing, they started
collecting waste paper, bottles, and cans to recycle and reuse.
→Having learnt about the benefits of recycling and reusing, the students started collecting waste paper, bottles, and cans to recycle and reuse.
Question 36. Sam had told a lie to his parents. He regretted it.
→ Sam regretted telling a lie to his parents