2018-2019学年高中英语Unit3CelebrationSectionⅠReading(Ⅰ)(Warm-up&Lesson1)学案北师大版必修1

Unit 3　Celebration“美国甜蜜日”目的是让人们开心，那么你知道它的起源吗？Sweetest Day is celebrated on the third Saturday in Oct