完成句子。
1. 我们必须牢记:在英语方面取得成功就意味着课外投入额外的工作.
    We need to ________ ________ ________ that to get ahead with English means putting in
     extra work outside of the classroom.
2. 你意识到噪音污染给我们的健康和环境带来的负面影响了吗?
     _______ you _______  _______ the negative effects that noise pollution has on our health
     and our environment?
3. 在实验室里做实验的时候,请遵守老师发出的指令.
    Please follow the _______  _______ by your teacher while doing experiments in the lab.
4. 他是演艺界冉冉升起一颗的新星.对他而言,前途无量,没有界限.
    He is a rising star in acting. For him, the sky is ________  ________ the limit.
5. 如果上周他没有被抓住作弊的话,他就通过考试了.
    He would have passed the exam if he _______ not _______  _______  _______ last week.
6. 在2008年四川省的汶川地震中有8万多人丧生,这一点至今仍然对我们有警示作用.
    Over 80 thousand people _______ _______ to the earthquake in Wenchuan, Sichuan
     Province in 2008, which is still alarming to us.