Rewrite the sentences so that they contain a passive verb, where possible. Some sentences cannot be rewritten in this way, write "X"

Rewrite the sentences so that they contain a passive verb, where possible. Some sentences cannot be rewritten in this way, write "X".
1 Fleming discovered penicillin in 1928. ...
Penicillin was discovered in 1928 by Fleming.
2 Everyone in the class arrived on time yesterday. 
 
3 A helicopter rescued the six survivors from the water.
.
4 The president congratulated the winner of the race.
.
5 Two prisoners escaped from the jail yesterday evening.
.
 
6 A policewoman found the two missing children in a local park.
.
 
7 They will publish her new book next year.
.
 
8 Suddenly a strange red light appeared in the sky.
.
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