The old professor told us that every part of the materials should be made use of _____ the station.
There were 20 people sitting in the room, half ___ were women.
---How __ is it? ---It's not __. It’s only two miles ___.
It rained heavily yesterday,___, he didn't turn up at the meeting.
The story happened ___ a cold winter day.
That’s __ I can tell you.