In recent years much more emphasis has been put______ developing the students productive skills.
Was it at the school ______ was named after a hero _____ he spent his childhood?
_____ in a heavy rain, the teacher fell ill and couldn’t but ______ for a leave.
Mr. Richard hasn’t got any time to play golf these days, because he is ______ in the research of bird language.
When the newspaper boy got to a blue door, __________, which frightened him away as fast as possible.
When the clock_________ twelve, all the lights went out.