https://online2.tingclass.net/lesson/shi0529/0009/9907/323.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
think on one's feet 急中生智，反應敏捷，隨機應變
Mike is really good at thinking on his feet.
Mike很善于急中生智。
There's no time for getting ready.You have to think on your feet.
沒時間準備了，你只能隨機應變
瘋狂練習吧!
