来源：学生作业帮 编辑：神马作文网作业帮 分类：英语作业 时间：2024/10/09 00:50:48
1.They are working hard. 2.The train arrives late. 3.The boy tried again and again.
解题思路： 注意时态。
解题过程：
1 He is singing in the room.
2 He studies very well.
3 The girl studied French two years ago .
快乐每一天！
最终答案：略
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