He spoke for quite a long time, but he threw no _________ on themain point.
We can't _____ one to change the habits of a lifetime in a short time.
He thought I was talking about his son, ____in fact I was talking about mine.
Catherine bought a postcard of the place she was visiting, addressed ___to ____and then posted it at the nearby post office.
When you have difficulty in learning new words, you can ____the dictionary.
John is one of the staff members who ___to be sent abroad for further study.