Complete with there is or there are. a) over 1 million people...

There are over 1 million people living in Porto Alegre

There is a book on the desk

There are many ways to do this

I think that there is nobody at home

There is a gift waiting for you

Explicação:

There are está no plural, ou seja, corresponde a mais de uma coisa

There is está no singular, então há apenas uma coisa