1、Until Madame Curie used X-ray to develop the radiactivity did the scientists realized its significance.
2、Saw the huge beast,Hally's pulse beating fast,he accelerated and drove out of the jungle.
3、In my family album,the first several pictures are taken when I was at kindergarten.
4、I always knew that he was fed up with to be a receptionist.
5、The audiences applaud for the athletes'skilful performance for a few minutes.
6.专家说烟草的使用可追溯到公元前1000年（date back）
6、The specialists said said that the tabacco could be dated back to 1000 BC.
7、I think you should delete the unnecessary repeat statements and back-check the punctuation before you hand in your composition.