例句： He could not but look up to the sky and sigh deeply when his lifetime of frustrations passed through his mind.

例句： He himself found the courage.

例句： Her books have been in popularity recently.

例句： Many people believe that private education encourages elitism.

例句： The chairman has also given his approval for an investigation into the case.

例句： Mary is a workers' representative on the Board.

例句： I'm very keen on outdoor sports.

例句： The school encourages free expression in art, drama and creative writing.

例句： He received four years of normal education at college.

例句： The lion is called the king of beasts.