1.学生自学生词，并记住单词拼写和拼读。
2.预习课本，找出重点短语和句式。
3.读、记后完成导学案中自学导练作业。
Step 1情景导入
T:Do you remember those signs that we learned yesterday?
S1：Yes.
T:Tell me the ones.
S1:Don’t touch; No smoking; No shouting;No photos； Don’t cross the road…
T：Great! Today we will understand the dialogue better and master more keywords, phrases and sentences.
Step 2 完成教材 Activities 4，5的任务
