The faces of four famous American presidents on Mount Rushmore can be seen from a _________ of 60 miles.
______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.
Bad habits are no way easy to be ______; it needs your determination and perseverance.
What a pity! Considering his ability and experience, he ______ better.
They advocate the proposal we were opposed ______ rediscussed at the next meeting.
The doctor advised the patient to give up smoking _____ his own health.