根据汉语完成英语句子。（共5小题，每小题2分，满分10分）
1.如果你告诉我他的住址我将非常感激
I would____________ ___________ if you would tell me his address.
2. 直到20世纪20 年代，阿富汗人和他们的骆驼还在做着这样的工作。
The Afghans and their camels did this _______ ______ _______.
3那是我第二次犯这么严重的错误.
That was the second time that I ________   _______such a serious mistake
4 在离开化学实验室之前，确保所有的灯都关上了。
Before leaving the chemistry lab, _______ _______all the lights are turned off.
5. 那些地震中幸存下来的人们将永远也忘不了他们那可怕的经历。
Those_______  ________ an earthquake would never forget their terrible experience.