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》 ****************************book5 unit5基础知识 **************************** i 重点单词 1. aid v. 帮助；援助；资助 n帮助； 援助 助手；辅助用品
