There ... many people in the city centre yesterday. (-)
There weren't many people in the city centre yesterday.
We ... really happy to see Suzy. (+)
We were really happy to see Suzy.
I ... by the sea last summer. (+)
I was by the sea last summer.
Where / you / two days ago / ?
Where were you two days ago?
What music / popular / 20 years ago / ?
What music was popular 20 years ago?
What / Hedy Lamarr / inventions / ?
What were Hedy Lamarr inventions?
these people / famous / ?
Were these people famous?
She ... born in 1998. (-)
She wasn't born in 1998.
I ... at school yesterday. (-)
I wasn't at school yesterday.
Bob / in the hospital / last week / ?
Was Bob in the hospital last week?
Picasso ... a famous artist. (+)
Picasso was a famous artist.
Films ... black and white 100 years ago. (+)
Films were black and white 100 years ago.