pretty expensive cheap nice2. Say and use this sentence :It’s _____.三、Teaching difficulties :1. The pronunciation of this word “ expensive”.2. How to go shopping ?四、Teaching aids :CAI pictures flowers practice paper五、Teaching procedures:Step 1: Warm-up:T: Good morning, boys and girls . How are you ?SS: I’m fine , thank you .T: Nice to meet you .SS: Nice to meet you too .T: What day is it today ?SS: It’s Wednesday .T: Yes , today is Wednesday and today is a special day too . Because my friend is coming .Let’s welcome my friend , ok ?SS: Ok.Step 2: Preview :T: This is my friend . Who is she ?SS: She’s Mei Yangyang