根据所给的汉语内容,用英语完成下列句子。 1. 下大约有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.