-cost -time -progress -culture -tired

good

feel well.

现在听原音课文时，会留意那些 连读及模糊发音，还没了解规律，单纯模仿易忘掉

-change one's mind -Cool it! -cost (someone) an arm and a leg -couch potato -crash course

Today I learned some very useful expression.

good

study step by step

自已太笨，不会举一反三,感谢老师 耐心指导。

good