As an official, one should serve the people at any cost _______sitting back to protect the chair.
— I don’t know whether I should go abroad or not, Mum.— I leave _______ to your own judgment whether you should do it.
_______ is well known _______ Hong Kong returned to China on July 1st, 1997.
The Parkers bought a new house but ______ will need a lot of work before they can move in.
It used to be thought _____ the Earth was flat.
He made _____ known to his friends that he didn’t want to enter politics.