passive voice

The first electric guitar .... in the USA in 1931.

• were designed

• was design

• was designed

The first photo ... by a French inventor.

• are taken

• was taken

• were taken

• take

Mobile phones ... of glass, plastic and different kind of metals.

• makes

• is made

• are made

Millions of photos ... every day.

• are taken

• is taken

• taken

Radio waves .... by Heinrich Hertz in 1886.

• is discovered

• was discovered

• were discovered

I .... to an exhibition.

• invite

• invited

• am invited

She ... a graffiti artist.

• is called

• are call

• are called

The first helicopter ... by Leonardo da Vinci.

• are designed

• were designed

• was designed

The Eiffel Tower .... by more than 10 million tourists last year.

• is visited

• was visited

• are visited

The cake... by Becky.

• are made

• were made

• was made