—             is the ball? —It’s under the table. 

Thank you for your help, Linda. You made ________ possible for us to finish the work in time.

______ is no doubt______ Bob can win the first prize in the match.

— Whose shirt is this? Is it Tom's? — No, it isn't. _______ is white.

---Miss Li has taught ____ English for about 3 years.---You are lucky. ____ is a very good teacher.