Просклоняй словосочетания. И. п. шестьдесят сорок шестьсот воробьев

Нужно просто определить какого числа существительное, стоящее перед глаголом was/were.

1)was.2)were.3)were, was.4)was.5)was.6)were.

Have you ever been to the Kremlin? - Of course,we have .We were there last Sunday"
"My little sister has not been to the zoo yet."
"your little sister has not been there?"- "Yes,she hasn't .She was at the zoo last weekend.But I have not been there for ages.Let's all go together.It's
worth visiting in May"
They have. already been to the museum.They were there last month.