知识目标：熟练掌握本单元的单词、短语及句型。

　　　 能力目标：能够运用本单元的单词、短语及句型进行交流。

Unit 4 I’m lost.

24.　 turn around

23.　 walk forward

22.　 step to the left

21.　 give me a call

20.　 go straight on this street

19.　 so far

18.　 follow my directions

17.　 at the corner