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（三）情感态度价值观目标：
通过教师的引导，学生在学习中的讨论、总结，了解英语学习的方法。
教学重难点
教学重点
1.掌握所有重点单词，短语和句型。
2.熟练运用一般过去时的被动语态。
教学难点：
熟练云用一般过去时的被动语态。
教学活动设计
Step 1 Greeting and Leading in
1.Greet the class.
2.T: What kind of food do you like ? Sweet, sour, bitter…?
Ss: I like ….
3: Look at these pictures, how will they taste?（归纳）
Step2 Pre - Listening
1.T：Look at 1a and 1b .
1 ) Ss work with their partners and try to write some proper words under the pictures.
2) Let some Ss read their answers. Try to remember the new words.
2.T： Do you like eating potato chips? I am sure most of us like them very much. But do you know who invented them and how they were invented？Today let's learn together to know more about the history of the potato chips.
Step 3 While-listening
1. First, let one Ss read the sentences in 1c. Make sure they know the meaning of each sentence.
2. Play the recording for the Ss. Listen for the first time. Play the recording again and judge T or F. Answers:TFTFFT
3. Listen and answer the questions.
1). Who invented potato chips?
Step 4 Post-Listening
T: Now you have learned how potato chips were invented.
1. Work in pairs. Make a conversation about the invention of potato chips. Use the information in 1c and 1d.
2. Ask some pairs to act out their conversation in front of the class.
3. Ask some students to retell the invention of potato chips ,using their own words.
Explain some key points.