根据所给的汉语内容，用英语完成下列句子。
1. 下周大约有500个学生参加运动会。
About 500 students will ______________ the sports meet next week.
2. 昨晚我哥哥直到完成作业才从房间出来。
Last night my brother ______________ out of his room ______________ he finished doing his homework.
3. 我们相互帮助是非常重要的。
______________ very important for us ______________ each other.
4. 妹妹问我是否可以在同家的路上给她买些面包。
My sister a§ked me______________ some bread for her on my way home.
5. 这些花必须天天浇水，否则就会枯死。
All these flowers ______________ every day, or they will die.
