—It’s reported that the new underground line has been completed. —Yes but it hasn’t been made clear________ it’s to be opened to traffic.
. 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 ?
They made a bet _____the white horse.