It is in the school ______ he studied ten years ago ______ he gave a wonderful speech.
The boy is only five years old, but he is quite used _____ the telephone.
--- What happened to your shoes? --- They want _____ 。 .
It is generally considered unwise to give a child _____ he or she wants.
He insisted that he _____ from heart trouble, but I didn’t think so.
The professor referred to _____ yesterday.