I was at the circus yesterday. It ... fun! There ... lots of animals there:elephants, monkeys and lions. There ... two funny clowns too! Their hair ... red and their hats ... orange. I ... very happy!

I was at the circus yesterday. It was fun! - ед. число

There were lots of animals there:elephants, monkeys and lions. - множ. число

Ther were two funny clowns too! - множ. число

Their hair was red and their hats were orange. - сначала - ед. число - потом - множ. число

I was very happy! - ед. число

it was fun

There were lots of

There were two funny clowns

Their hair were red and there hats were orange

I was very happy