【2015·四川】The exhibition tells us____we should do something to stop air pollution.
Jack ________ have fought with the policeman. —Yes. If one ________ ask for trouble, it can’t be helped.
It was unusual that such close neighbors ______ not know one another.
Music should be taught routinely in schools because of the benefits _____ can have on the development of the brains of young children.
It’s always hard to remember a name when one doesn’t have a face to go with ______.
In the darkness, she felt ________, but when she turned around, nobody was there.