Complete the sentences so that mean the same as the original

1. I wore a helmet and thats why I didnt get hurt when the kayak hit the rock. If I hadnt worn a helmet I would have got hurt when the kayak hit the rock.
2. They have just built a five-star resort on the coast. A five-star resort has just been built on the coast.
3. Im sorry I cant go with you to the Opener Festival in Samara. I wish I could go with you to the Opener Festival in Samara.
4. You must revise a bit more before a unit test. Youd better revise a bit more before a unit test.
5. They are restoring a little church near where I live. A little church is being restored near where I live.
6.  Im so angry I forgot to take my camera. If only I had taken my camera I wouldnt be so angry.
7. Matthew didnt revise for the exam. No wonder he flunked it. If Matthew had revised for the exam he would not have flunked it.
8. Im sure they will buy hi-tech equipment for the expedition. Im sure hi-tech equipment will be bought for the expedition.