1.They have just sold that old house.
⇒The old house has just been sold.
2.It was such a hard cake that I couldn’t eat it.
⇒The cake is too hard for me to eat it.
3.I last heard this song ten years ago.
⇒It is ten years since I last heard this song.
4.It was a two- hour flight from Hanoi to Ho Chi Minh city.
⇒It took me two hours to fly from Hanoi to Ho Chi Minh city.
5.We don’t have enough money, so we can’t buy that house.
⇒If we had enough money, we could buy that house.
6.Although he took a taxi, Bill still arrived late for the concert.
⇒Despite taking a taxi, Bill still arrived late for the concert.
7.” Where does your brother work?” she asked me
⇒She asked me where my brother worked.
8.I haven’t seen Liz for six months.
The last time I saw Liz was six months ago.
9.Study harder or you won’t pass the exam.
⇒If you don't study harder, you won't pass the exam.
10.Hoa went to bed early because she was tired.
⇒Hoa was tired, so she went to bed early.