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Unit 3 Let’s go to the Underwater World. Period 2 First. teaching objectives: 1. part A can repeat the texts, skillfully use imperative sentence to express their wishes. Second. focus on teaching and difficult points: Focus: A repeat of the text. Difficulties: the proper use of imperative sentences to express their wishes. Third. teaching preparation: bread, biscuits, milk, a little water, a carton, word cards, wall charts teaching, teaching tape, and so on. steps: Step 1. Warming up 1. Regards to teachers and students 2. Has been learning to sing the song in English. 3. Use of the card or pictur