Lesson 3.pptpage1必修1page2Lesson 3A Volunteer Teacherpage3words review n. 志愿者volunteergraduateminusbasinchallengesupportdialdesignsolvepresentationadvertisementvi. 毕业adj. 零下,负n. 脸盆supportn. 挑战 vt&n. 支持n. 表演,展示n. 广告 n&vt. 设计vt. 拨(电话号码)vt. 解决;解答page4objectiveTo guess the meaning of the words: support, solve, design, volunteer, challenge, advertisement, presentation, graduate, be excited about, make a decision, prepare, to tel..