Section B 第 4 课时（2a~2c）类别学习重点重点单词useful, from, Mrs. , finish, lesson, hour重点短语be useful, from…to…, finish（doing）sth.重点句式1. The teacher says it is useful, but I think it is difficult. 2. Lunch is from 12: 00 to 1: 00, and after that we have Chinese. 课前预习写一...
