—— Ann is in hospital.____ Oh ,really? I ______ know. I ______ go and visit her.
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.
There is a _________ of 1000 dollars for the return