1. grasp 7 words and 4 phrases and 2 sentence patterns in the two units and improve your ability to express yourself in english. 2. learn the method of constructing knowledge trees through self-study and cooperative exploration. 3. attach great importance to basic knowledge and enjoy the beauty of english with a strong passion. **************************** book 5 unit 3基础知识************************** i. 重点单词 1. lack v. 缺乏；短缺 n.缺乏；短缺的东西 lacking adj.缺乏的 1) lack v. 缺乏；短缺 a coward lacks (in) courage.怯懦者缺乏勇气。
