--- Many years has passed since I last saw you. I didn't recognize you at first.--- I , either, if someone hadn't called you by name.
__________ is no possibility__________Bob will win the first prize in the match.
Shanghai has taken on a new look.It isn’t like__________it used to be.
It worried Mary a lot__________she would pass the college entrance examinations.
__________ caused the accident is still a complete mystery.
__________that they found an unusual plant in the forest.