1. grasp the important words and phrases 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. enjoy the beauty of english with a strong passion. 《课前预习》 ***************************book 4 unit 4基础知识*************************** ⅰ重点单词 1. approach vt. &vi. 接近，靠近；走近 n. 接近;方法；途径 (1) he approached me with stealthy steps. 他悄然走近我。
