---Susan is so excited!---Oh, yes! She is busy preparing for her trip to Africa that she _____ for years.
. He misunderstood _____ I said.
. The trouble is _____ we are short of hands.
The guide showed the travelers _____ of the factory.
We should mind our behaviour ______ public.
Excuse me, I have no ______ on me. Can you _____ the note of 100 yuan ?