Though he failed in the experiment again and again, he didn’t______, and at last, he made it.
Who is making so much noise in the garden? __ the children.
—Is there anyone who is gong the Great Wall?_______
Andeison entered the classroom, ____book in ___hand.
She studies ___ medicine before she turned ___ writer.
His uncle gave him books to read, but after a page or two he would put __book down and pick up__ new one.