The United States and Russia signed an agreement to dispose of sixty-eight tons of weapons-grade plutonium.

VOA: special.2010.04.17

you know, from going to public, or Catholic school from first to eight grade.

你知道，从天主教学校换去公立学校，从一年级到八年级

现在的孩子好可怕 - SpeakingMax英语口语达人