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2）通过食物制作过程的介绍, 让学生认识到劳动成果的来之不易, 使之懂得不能浪费食物, 珍惜他人的劳动成果。
二、教学重难点
1. 教学重点：
1) 掌握本课时出现的生词及表达方式。
2) 进行听力训练，提高综合听说能力。
2. 教学难点：听力训练
三、教学过程
Ⅰ. Warming- up and revision
1. Daily greeting.
2. 让学们复述如何做爆米花。
S1：First, put half a cup of corn into the popcorn machine.
S2：Next, turn on the machine．
S3: Then, pour the popcorn into a bowl.
S4: Finally, put some salt. You can eat it.
3.观看三明治纪录片，导入本课。然后提问Can you guess what is in the sandwich？
Ⅱ. Before listening
看图片Ask Students that what ingredients they need. 学习生词lettuce，sandwich, butter, turkey, lettuce, piece 并写出what do you like to put in your sandwich？
2. Make a survey and give a report
Talk about the ingredients they like in the sandwich and make a survey.
S1: Do you like lettuce in a sandwich?
S2: Yes, I do.
S1: Do you like tomatoes?
S2: No, I don’t. What about you?
S1: …
2给出一个报告，例如
In our group, _ Lucy_ likes/dislikes __tomatoes_ in a sandwich.
…
Both _ Tom _ and _ Jim __ like/dislike _beef_ in sandwiches.
And we all like/dislike _cheese_ in sandwiches.
Ⅲ. While listening