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.

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