The passive sentence is:

1.   ?    Mosquitoes bite people.
2.   ?    People are bitten by mosquitoes.

The passive sentence is:

1.   ?    News stories are written by reporters.
2.   ?    Reporters write news stories.

The passive sentence is:

1.   ?    Many people read newspapers.
2.   ?    Newspapers are read by many people.

The passive sentence is:

1.   ?    Newspapers are bought at newsstands.
2.   ?    People buy newspapers at newsstands.

The passive sentence is:

1.   ?    Dogs chase cats.
2.   ?    Cats are chased by dogs.

The passive sentence is:

1.   ?    Steve made this cake.
2.   ?    This cake was made by Steve.

The passive sentence is:

1.   ?    Lightning is followed by thunder.
2.   ?    Thunder follows lightning.

The passive sentence is:

1.   ?    John has taken over my desk.
2.   ?    My desk has been taken over by John.

The passive sentence is:

1.   ?    Bill is doing the dishes.
2.   ?    The dishes are being done by Bill.

The passive sentence is:

1.   ?    Maria finished the job.
2.   ?    The job was finished by Maria.

The passive sentence is:

1.   ?    That painting was done by Picasso.
2.   ?    Picasso did that painting.

The passive sentence is:

1.   ?    The baby was being carried.
2.   ?    He was carrying the baby.

The passive sentence is:

1.   ?    The lecture was given by Prof. Gunn.
2.   ?    Prof. Gunn gave the lecture.

The passive sentence is:

1.   ?    John put those books away.
2.   ?    Those books were put away by John.

The passive sentence is:

1.   ?    They are serving dinner at 7 o'clock.
2.   ?    Dinner is being served at 7 o'clock.