Helen draws better than ___ boy in her class.　　　 

Which of  the two cameras are you going to buy?—I’ll buy      of them，so I can give one to my friend．

—________that China has the largest number of iphone4s users now.— I believe so.

－Tom, who taught          Chinese before you came to China?－Nobody. I learned it by        .

— What about this dress? — I don’t like the colour. Please show me ______ one.