Passive voice

It must……………without delay.

• be done

• have been done

• do

• be doing

On September 9, 1850, California……………to the United States as the thirty-first state.

• have admitted

• admitted

• was admitted

• was admitting

Many serious childhood diseases……………by early immunization.

• are preventing

• can prevent

• prevent

• can be prevented

The diagrams ______ by young Faraday in 1982.

• were making

• made

• have been made

• were made

The letter is so long. It ______ by Peter.

• was writing

• written

• is writing

• was written

Richard ______TV when the phone rang.

Walters ________ no major book since he settled in Uganda.

• has published

• publishes

• published

• had published

These pandas _______(release) into the wild park next month.

I still cannot believe it! My bicycle ______ some minutes ago.

• was stolen

• was stealing

• stolen

• stole

By this time next summer, you ______ your study.

• complete

• will complete

• are completing

• will have completed