1.Vocabulary(词汇)： avoid ,brave, excuse ,thought, rewrite, rewritten, bet.
2.Useful phrases (有用的短语)：so that目的是…… ;on one’s own 独自地,come up 出现,发生,be good at 擅长,look forward to 期待,盼望……
3.Special Difficulties (难点 )：词组so that so …that的区别
4.Key Structures(关键句型) ：由so that, because, so 等引号的状语从句
