— May I speak to Mary? — This is ________ speaking.
--You don't look so well, Mary. What's the matter with you?--Why?___________.
China has hundreds of islands, ___________ is Taiwan Island.
You must have waited here for a long time ,___________you?
I don't remember___________ to the airport that year.
A man does not know the difficulty of anything_________ he does it personally.