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. Free talk: Ask and answer. 3. Review: the use of singular and plural form in different sentences 二、授課 1. Show a picture: Say as the following patterns: This is ______ and that is______. These are ______ and those are______. 2. Create different scent to practice the drills: 1) These aren’t _________. Those aren’t __________. 2) Are these____? Are those____? Yes, they are. / No, they aren’t.