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ake photos on a trip 主語(yǔ) + be +doing sth. 【 佳作鑒賞 】 Today is Sunday, and it’s a sunny day. We’re on a school trip at the Daming Lake Park. All the students are having a great time. Some are singing under a tall tree, some are dancing, some are taking photos, and others are drawing pictures. Look, some boy students are playing soccer over there. I think the tri