Their parents have ______(success) bought a Canton camera.用所给词的适当形式填空
how are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doinghow are you doing