求翻译：上课时他非常严肃，课后他陪我们打篮球，我们非常开心。周末他带我们去爬山，和他在一起的日子很开心。可他要回国了。那天，我们班的同学都来替他送行，看着他离开。是什么意思？

Class he was very serious, he accompanied us to play basketball after school, we are very happy. He took us to go hiking on weekends, and he is very happy with the day. Can he come home. Day, the students in our class have to back him off, watched him leave.

During class, he was very serious, after-school him to accompany our basketball, we are very happy. Last weekend, he took us to go hiking with him very happy days. He had to come back home. On that day, our students have to back him off, and saw him leave.

Attends class when he is extremely serious, after the class he accompanies us to play the basketball, we are extremely happy.Weekend he leads us to climb a mountain, is very happy with him in the together day.But he wanted to return to homeland.That day, our class's schoolmates all come for him to s

He is very serious in class, he accompanied us to play basketball after class, we are very happy. He took us to climb over the weekend, and the days when a lot of fun to be with him. But he had to return home. That day, the students in our class to send off for him, watching him leave.

He is very serious in class, he accompanied us to play basketball after class, we are very happy. He took us to climb over the weekend, and the days when a lot of fun to be with him. But he had to return home. That day, the students in our class to send off for him, watching him leave.