12. The teacher didn't _____ to my questions which were not too difficult for me to think over.
Jack felt unhappy as they all went outing ____ him.
The police have ____ power to deal with such matters by ____ law.
Listen! His family must be quarrelling, ____?
The little girl couldn’t work the problem out. She wasn’t ____ clever.
The engineers made two big plans for the dam, ____ was never put in force.