摘要： Lesson 1 1d 2a 3c 4c 5d 6b 7d 8d 9c 10b 11b 12aLesson 2 1d 2b 3c 4b 5d 6b 7c 8a 9b 10a 11a 12cLesson 3 1d 2d 3a 4d 5b 6c 7b 8b 9a 10d 11b 12bLesson 4 1a 2c 3d 4b 5d 6c 7b 8c 9d 10b 11c 12aLesson 5 1c 2b 3a 4b 5c 6d 7b 8c 9c 10b 11d 12dLesson 6 1b 2a 3c 4d 5b 6a 7a 8d 9a 10a 11b 12cLesson 7 1b 2d 3b 阅读全文