With ________ successful launch of the first space lab module Tiangong-1, China’s space dream has taken ________ step closer to reality.
Is this _____ ?
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 ?