四年级上词汇及句型Unit one Why are you so happy?词汇：情绪心情 sad, happy, angry, upset, worried, tired, excited, surprised,glad句型：1. Why are you so happy? - Because we are back at school. Why is she so angry? - Because the room is messy. 2. Why do you look so sad? - Because my dog is missing. Why does he look so surprised? Because the gold is missing. 3. Why are you sad? -Because my new football is missing. Why is he worried? - Because
