If we had taken such effective ______ much earlier, the river would not be polluted so seriously now.
Sometimes I wonder ______ that has made me feel differently from the others.
The day before yesterday the police including one officer ____ searching for the murder in that mountain.
This school is _______ for experienced teachers.
John thinks it won’t be long he is ready for his new job.
—How do you find my idea? —_______.