—— Tom, did Mr.Li join you in your dicussion? —— No, he____, but he happened to have fallen ill.
.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.