Упражнение 1. Заполните пропуски глаголом в Past Continuous, используя правильную форму

Упражнение 1. Заполните пропуски глаголом в Past Continuous, используя правильную форму глагола be.
I was reading a book at 4 oclock yesterday.
You . reading a book.
He . reading a book.
We . reading a book.
She . reading a book.
They . reading a book.