John’s ability to learn from observations and experience _______ greatly to his success in public life.
Thank you for the trouble me with the work.
His name was on the _____ of my tongue, but I just couldn't recall it.
Though he did not say so directly, the inspector _____ the man was guilty.
Mr Smith, of the speech, started to read a novel.
All of us still remember the terrible earthquake that Tangshan twenty years ago.