科研之友
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<正>一、教学过程Step 1. Warming-up and free-talk（略）Step 2. Leading-in1.Guess game.(Show an old photo.)T:Look at the old photo,who is she?S:Is she your daughter?T:She looks a bit like me.But, she is not my daughter.Guess again.S:Is she your sister?T:No. Haha, actually, it’s me, Emma. This is a photo about25 years ago. At that time, I was in Grade 1. I changed a lot,Didn’t I?
