Question

what is the passive voice of:
1.You are invited to a party.
2. A man delivered a message
3. the chef is cooking something special today.
4. prayer gives us strength
scientist are doing their best to discover a cure for cancer
5. we have to greet our elders.
6. he holds the key to the mystery
7.i cannot tell what will happen tomorrow.
the train leaves the station at exactly six oclock.

Answer 1

2.A message was delivered by a man
3.Something special is being cooked today by the chief
4.we are given strength by prayer
5.Our elders have been greet to us
6.The key is holded the mystery by him