—Wow, winter swimming is so fascinating! Shall we have a try?— ! It is not my piece of cake.
. 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 ?