_______ difficult and challenging the task may be, we must finish it on time, because there is a possibility _______our work will go down in history.
--____________?--He is tall and strong.
She suggested to the police in the police station that__________.
I told you that you shouldn't waste your time playing the computer games,_____________?
Towards ___________ morning, _________ heavy snow began to fall.
It was not until the end of the meeting_____________.