bài 1 :
1. The keepers feed the lions at 3 pm every day.
⇒ The lions are fed by the keepers at 3 pm every day
2.We got lost because we didn't have a map.
⇒ If we had had a map, we wouldn't have got lost
3.I would prefer you to deliver the sofa on Friday.
⇒I would rather you delivered the sofa on Friday.
4. The bridge was so low that the bus couldn't go under it.
⇒ It was such a low bridge that the bus couldn't go under it.
5.That was a silly thing to say.
⇒What a silly thing to say!
6.We've run out of tea.
⇒ There isn't any tea left.
7.I last saw him when I was a student.
⇒I haven't seen him since I was a student.
8.Susan was too excited to sleep.
⇒Susan was so excited that she couldn't sleep.
9.Robert has not had a job for two years.
⇒Robert has been out of job/ jobless/ unemployed for two years.
10.She will complete the work only she is paid extra.
⇒She will not complete the work unless she is paid extra/ if she is not paid extra.
bài 2 :
1) All the students love the principal because of his kindness.
2) I’m sorry for having forgotten the tickets.
3) If I hadn’t seen it with my own eyes, I wouldn’t have believed it.
4) The house at the end of the street which has been empty for years has been sold.
5) I wish he took the doctor's advice.