2. She shared her snacks with her friends during lunchtime. (她在午餐时间与朋友们分享零食。)
3. The teacher explained the math problem step by step. (老师逐步讲解了数学问题。)
4. He rode his bicycle to school every day. (他每天骑自行车上学。)
5. They built a sandcastle on the beach. (他们在海滩上建了一个沙堡。)
6. She practiced the piano after school. (她放学后练习钢琴。)
7. The family went on a picnic in the park. (这家人在公园里野餐。)
8. He studied hard for the science exam. (他为科学考试努力学习。)
9. The students presented their projects to the class. (学生们向班级展示了他们的项目。)
10. She took care of her little brother at home. (她在家照顾她的小弟弟。)
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