Вставить was, were, is, are: It 10 oclock in the evening.

Глагол to be в истинном времени имеет 3 формы: I - am; he, she, it - is; we, you, they - are.

В прошедшем медли to be имеет форму was для единственного числа, were для множественного.

It is 10 oclock in the evening. The children are in bed now. They were in the living room 3 hours ago. Their father was at work yesterday but now he is at home.