Each member country WTO must ___________ its laws and regulations and compete on the principle of fairness and cooperation.
Is that a book on farming? If so, I want to borrow___.
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.