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.