[外语] 请帮忙给修改一下这五个汉译英句子.

2. 她当时是她班级里最小的一个学生。
    She was the youngest pupil in her class then.
4. He was on time for the school bus. so he went to school not late.建议改为：
　He was on time for the school bus, so he was not late for school..