Lesson l01～l02
    1.association n. 協(xié)會(huì)；會(huì)；團(tuán)體
    students' association 學(xué)生會(huì)（同義習(xí)語還有：students' government, students' council）
    例句：Excuse me, can you tell me where the Students' Association is meeting?
    對(duì)不起，你能告訴我學(xué)生會(huì)在哪開會(huì)嗎？
    2.why 為什么
    Why not? 為什么不呢；好！（表示同意）( good idea，that's ()K)
    A:How about coming to dinner with us at 7?
    A:七點(diǎn)鐘來和我們吃晚飯?jiān)趺礃樱?BR>    B:Why not?
    B:好！